a

英 [ə; eɪ] 美[e]
  • n. 字母A;第一流的;学业成绩达最高标准的评价符号
  • abbr. [物]安(ampere)

CET4CET6高频词基本词汇

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a beam of light a bird in the hand a bit a blast of a bolt out of the blue a bottle of a burning desire a carton of a case in point a cluster of a column of water a constant temperature a couple of a crew of a crushing blow a cup of a far cry from a favorite topic a few a glass of a good deal a good many a good rest a grain of truth a great deal of a great deal a great many a great number of a great variety of a gust of wind a handful of a host of a household word a kind of a last resort a liter of milk a litle a little bit a little a lot (of) a lot of a lot a matter of a mess of a multitude of a number of a pair of a picture of a piece of cake a piece of a pile of a quarter to ten a roll of a rule of thumb a running nose a sea of a series of a set of A short walk away a slice of a speck of a strip of a suite of a telephone booth a trifle a variety of a vial a wealth of A. M. abandon oneself to abide by abound in above all above board above reproach absence from abstain from access to accomodate to according to account for account receivable accountable for accounts payable accuse of accuse sb. of accustomed to Ace Travel acetylsalicylic acid acid rain across from across the board across the world act for act on act up action film activity book adapt oneself to adapt to add to add to add up to add up addicted to adhere to adjust to admission ticket admission to admit to advance payment advanced composition African American after all after class after school again and again against all the odds Agnes Grey agree on agree to do sth agree with sb. agree with sb agree with ahead of schedule ahead of time ahead of aim at air conditioner air conditioning air current air hostess alarm clock Alcatraz Island alexander graham bell all (the) year round all along all around all at once all but all day long all day all in all all kinds of all manner of all night long all of a sudden all out all over again all over all right all risks all sorts of all the best all the same to all the same all the time all the way all the while all things considered all thumbs all told all year round allow for allow of along with ambulance man amine acid amount to amusement park an arm and a leg an array of analogue television and so forth and so on and the like And you angle for animal world answer for answer the phone answer to any more anything but anything else anything like apart from appeal to sb. appeal to apple pie application for application to apply for apply oneself to sth apply to approach to approve of arctic (tern) Arctic Circle arise from arm in arm armed force around the corner around the world arouse controversy arrive at Art and Craft art room Arthur Conan Doyle arts and crafts as as possible as a general rule as a matter of course as a matter of fact as a result of as a result as a rule as a whole as as possible as as as far as be concerned as far as one is concerned as far as as follows as for as go as good as as if as it is as it were as long as as much as often as not as opposed to as regards as soon as possible as soon as as such as the case might be as the name suggests as though as to as usual as well as as well as with as yet Ashrita Furman Asian Games aside from ask after ask for a ride ask for assembly line asset account assets income assets settlement associate with assume control of astronomical body at a blow at a crossroads at a glance at a loose end at a loss at a pinch at a premium at a rate of at a run at a stretch at a stroke at a time at all costs at all events at all times at all at an angle at an end at any price at any rate at any time at best at dusk at ease at fault at first glance at first sight at first at full blast at full tilt at hand at great length at heart at home and abroad at home at intervals at large at last at least at length at liberty at long last at maturity at midnight at most at night at no time at odds with at once at one time at one with at present at random at risk at school at sea at sight at stake at that point at the age of at the back of at the bus stop at the cost of at the crack of dawn at the end of (August) at the end of at the expense of at the latest at the mercy of at the moment at the opposite extreme at the outset at the outside at the peak of at the ready at the request of at the same time at the sight of at the suggestion of at the top of at the word of command at this rate at times at war at will at work Atlantic Ocean ATM machine atmospheric pressure attach importance to attach to attend to attribute to au pair audio device avail oneself of await publication back and forth back cover back down back off back sb up back up bad breath badly off baggage claim baking tray balanced diet bald eagle baleen whale ball game ball pen ballpoint pen bamboo shoot bang into bank account bank clerk Bank of China barbecue meat barber shop bargain for bargain hunter baseball player Based On basketball game be able to be about to do be absent from be absorbed in be accused of be accustomed to be admitted to be afraid to be aimed at be all set be anchored in be angry with be ashamed of be associated with be at war with be aware of be attributed to be bad for be beneficial to be based on be capable of be careful with Be careful be carpeted with be carried away be cast up on be characteristic of be charged with be compared to be compatible with be concerned about be condemned to death be contrary to be convinced that be crazy about be dedicated to be directed against be drafted into be eager for be equivalent to be faced with be familiar to be familiar with be famous for be glad to be good at be hard on be hard to say be harmful to be ignorant of be in agreement be in contact with be in the hands of be indispensable for be jealous of be known as be late for be left for dead be locate in be located on be loyal to be made from be made of be made out of be made up of be modeled after be of prime importance be packed with be patterned on be paved with be pleased at be pleased with be preferable to be prejudiced against be ready for be recognized as be related to be relative to be relevant to be reported as be representative of be resistant to be satisfied of be satisfied with be scared to death be seated be similar to be suitable for be sure about be taken by be the case be the making of be the rage be to blame be traced to be trapped be typical of be viewed as be weak in be worried about bean curd bear down bear on bear out bear sth or sb out bear up bear with bearing circle beat around the bush beat about the bush beat it beat up beaten track beauty shop beauty spot because of bedside table Beg your pardon begin with the idea that behind bars Beihai Park Beijing International Airport Beijing Opera bend over backwards beyond all question beyond compare beyond measure Big Bang bill of lading birth rate birthday party black and blue black pepper blank cheque blaze a trail block and tackle blood plasma blood stream blood sugar blue whale board rubber board up boarding card boarding pass boarding school body and soul body language boiled water book stand botanical garden boys and girls brain drain brain wave branch out break away from break away(from) break away break down into break down break even break in break into break off break out break the ice break the record break the rule break through break ties with break up bring about bring around bring back to life bring back bring forward bring into operation bring into play bring to a halt bring to an end routine bring to our attention bring up the rear Bronze Age brush aside Buckingham Palace bull shark bumper car burial chamber burst apart burst into laughter business card buy a skateboard by accident by air by all means by analogy by and by by and large by any chance by boat by car by chance by comparison by contrast by far by hand by heart by leaps and bounds by law by means of by mistake by no means by plane by reason of by sea by the (thousands) by the age of by the same token by the way by trial and error by way of cable car cable TV call back call at call back call for call forth call in question call in call it a day call off call on call out call sb up call somebody up call up call waiting calm down Cambridge Street camping site camping trip can I help you can not but can not help candy bar cannot help but capable of Capital Stadium Captain Bligh capture the imagination of carbon copy carbon dioxide care about care for carry away carry back carry forward carry off carry on carry out carry over carry through carry weight carte blanche Cartoon City carve out carve out of carve up case study cash crop cash down cash in on cash register cash prize cast about for cast aside cast down cast iron cast lots cast off cast out catch a glimpse of catch a mouse catch at catch butterflies catch bus catch fire catch on fire catch on catch out catch sight of catch up with catch up cater to caught up with cause damage to cave painting CD player CD Walkman cease to be centre around chains of islands chamber music chance on change hands change into changing room channel tunnel chaos and confusion Charlotte Bronte chat room chat show chemical bond chemical compound chemical integration chinese cabbage Chinese character Chinese New Year chinese tea choke back christmas day Christmas tree circulatory system civil law civil war clamp down on class monitor clay pottery clean a room clean out clean the bedroom clean the kitchen clean the living room clean the room clean up clear away clear off clear out clear the air clear the table clear up climb mountains club sandwich coal mine coal seam coated with coffee table collect leaves collect stamps colonial expansion come about come across come along come apart come around come at come away come back to life come back come into operation come into play come onto the market come to a halt come to a head come to an end come to no harm come to tea come under heavy criticism come up against commit a crime communicative competence commuter train compare notes compare to compare with computer game computer programmer concentrate on concentration on continental drift continental shelf contract for purchase contract for service contract interest contract life contrary to contrast with cook the meals count against countable noun country park crack down crack up craft of poetry crash landing crawl with credit card criminal offence critical point culminate in curriculum vitae curtain call cut across cut back on cut back dairy product dance to jazz music dark horse dash off date back to date from day and night day by day day in, day out dead beat dead to the world deal in deal with death penalty Declaration of Independence dedicate oneself to depart for department store depend against descriptive statistics desert island desert landscape die away die break die hard digital television dining hall direct at distance runner do a favour do a show do an experiment do art projects do away with do gardening do some cleaning do some reading do the laundry Donald Duck double quotation marks down payment dozens of a lot of draft plan drag on dragon boat festival dragon boat dragon dance dragon dances draw a conclusion draw a veil over draw in draw on draw pictures draw up dream of dream up dress up as dressing table drink water drive a hard bargain drive at duct gland DVD player dwell at each of each other eagle eye early on earn the name of ease off east germany East Lake Road eat breakfast eat dinner eat out eat up electric resistance electric traction line electrical appliance electrical shop electromagnetic spectrum Elephant Trunk Hill empty the trash end table endangered species energy channel English Channel English class enter a race entrance requirement environmental concerns environmentally friendly equilateral triangle escape from even as every day every now and then every walk of life exchange student exocrine gland expansion program expiration date explain away exploratory trip eye contact face paint face to face face up to sth face up to face value fact sheet fade away fade out fair play fairy tale fall asleep fall back on fall back fall behind with fall behind fall for fall ill fall in between fall in love (with sb.) fall in love with sb. fall in love with fall in love fall in steps with fall in with fall into fall off fall on fall out fall over fall prey to fall short of fall through fall to the ground fall to familiar with family name family tree fantail goldfish far and wide far away from far away far from fashion designer fashion show fast food fasten to Father Christmas fault system feel at home few and far between find fault with find fault fine arts fire alarm fire station first aid first and foremost first name First Nations first of all fishing enthusiast flare up flash out flatter oneself flea market flight attendant flour sack flow chart fly a kite fly away FM radio focal point food stall fool about football field for a day trip for a moment for a time for a while for all for anything for certain for example for fear of for good and all for good measure for instance for my part for real for sale for that matter for the most part for the sake of for the taking from generation to generation from place to place from scratch from without and within frost heaving fruit stand full authority gain a win gain an advantage over gain easy access gain ground gain interest among gain momentum gain on gain weight gamble away gambling house game show games of chance gamma radiation gap year garage sale garbage disposal gas station gas stove gather in gear up gem topaz general hospital generally speaking geologically speaking geomagnetic field George Bernard George Hambley get a move on get about get across get along with get along get around get at get away with get away get back get in the way get into a bad habit get into hot water get ready for get ready get the hang of get under way giant panda give a hand give a lesson give away give back give oneself airs give way to sb give way to give way Glacier National Park glare at go about go after go against go ahead go along with go along go around go as follows go away go back as far as go back on go back to go back go boating go by the name of go camping go far go for a picnic go for a swim go for a walk go for walks go from bad to worse go halves go into details go on a diet go on a trip go on about sth go on an outing go out of fashion go rowing and fishing go skating go straight on go straight go to a movie go to great lengths go to jail go to the cinema go to the drama club go to the playground go without saying gold medal golden eagle good afternoon good and good at good idea good Samaritan goodwill ambassador governing class graduation ceremony grand opening grand total grass plains graze on Great Auk Great Barrier Reef great white shark green beans green tea grin and bear it grizzly bear guinea pig had best had better(do) had better hail from hair band hair salon half an hour half brother half past seven half past halfway path hammer away at hammer out hand down hand in hand hand in hand on hand out hand over handsome salary hang about hang back hang on to hang on hang out hang together hang up happen to Happy Birthday! happy birthday to you happy birthday Happy New Year! harden into hardly ever has got has(have) got have a bath have a bearing on have a bone to pick with have a cold have a fever have a gift for have a go have a good idea of have a good time have a great time have a headache have a link with have a look (at) have a look at have a look have a picnic have a rest have a say have a seat have a sore throat have a swim have a thing about have a toothache have a try have access to have an advantage over have an appetite for have an eye for have authority over have been to have breakfast have but one have classes have contact with have dinner have effect on have English class have faith in have fun with have fun have got to have got have had it have in common have in mind have intimate knowledge of have it in for have less to do with have lunch have mercy on have more to do have no business have no idea have no use for have nothing to do with have on sth. have on have power over have school have something done have something in common have sth. to do with have the making of have the upper hand have to do with have to head for head teacher health care hear about hear from hear of hear out hearing loss heart attack heartbreak over heavy rain herculean task here and now here and there Here they are here you are high plains higher education Highgate Cemetery hired hand historical perspective hold back hold fast to hold in place holiday brochure home page hope against hope horse and cart horse racing host family House of Representative housing estate how about How are you how far how many hula hooping human being human immunodeficiency virus human race hydraulic shield hydrogen cyanide I dare say IC card ice cream ice skating ID card in a flash in a hurry in a low voice in a manner of speaking in a mess in a minute in a moment in a row in a rush in a sense in a way in a word in abundance in accord with in accordance with in addition to in addition in advance in aid of in all probability in all in alphabetical order in amazement in answer to in any case in any event in any way in back of in behalf of in black and white in case of in case in cash in celebration of in chaos in character in charge of in charge in class in collaboration with in comparison with in consideration of in contact with in contrast in contrast to in danger in default of in defiance of in demand in detail in different ways in duplicate in earnest in face of in fact in favor of in favour of in general in good faith in good health in good shape in half in hand in harmony with in haste in hospital in jail in large numbers in large quantities in league with in many ways in miniature in nature in no case in no way in operation in order that in pairs in part in particular in peace in place of in place in practice in private in quantity in rags in reality in relation to in search of in season in so far as in some cases in some ways in summary in tears in that case in the abstract in the afternoon in the act of in the aggregate in the air in the balance in the circumstances in the dark in the daytime in the distance in the event that in the face of in the first instance in the first place in the habit of in the hands of in the hope that in the main in the meantime in the name of in the open air in the past in the raw in the saddle in the same boat in the wake of in the way of in the way in this way in total in vain inasmuch as Inca Empire inner mongolia instead of intellectual property intensive care unit International Labor Day internet cafe Jabez Wilson James Dyson Jane Austin jaws of death jet lag jigsaw puzzle join hands Joseph Banks jump out at jumping jack Jurassic Park just a minute just a moment just about just as well keep a diary keep a promise keep abreast with keep an eye on keep at a distance keep at keep away from keep back keep company with keep company keep on board keep pace with keep to the beaten track keep track of keyboard instrument kick a shuttlecock kick about kill the fatted calf killer whale King Lear knock about knock at know about know backwards know better than Kofi A. Annan labour day laden with Lake Superior Lake Taupo Lake Titicaca lamp post lantern fair Lantern Festival lap up Las Vegas lash out at last but not least last name last night last week late news later on later years laugh at laugh off lava cave law firm lawn mower lawn sprinkler lay aside lay bare lay claim to lay down lay eggs lay off lay out lay over lay the table lay up lead a life lead out lead the way lead to leading edge leaf through lean out of Leaning Tower of Pisa leap year learn by heart learn from learn to act learn Wushu least of all leave behind leave alone leave behind leave for leave off leave out lend sb. a hand Leonardo da less than let alone liberal arts library card life jacket light rail like a shot like crazy like mad literary output litter basket living quarters loan shark London Heathrow Airport long ago long hair look after look ahead look around look at sth look at look back look forward (to) look forward to sth look forward to Los Angeles lose contact with lose face lose heart lose track of lost and found love affair loyal to lubricating oil lunar calendar lunar probe Machu Picchu made up of Magic Earth maglev train mail a postcard main course main subject main unit maintain order major general major in make a bet make a clean breast of make a contribution to make a decision make a difference make a fire make a fool of make a fortune make a fuss of make a life make a living make a mess make a mistake make a mock of make a model plane make a name make a noise make a phone call make a point of make a point make a promise make a reservation make a snowman make a speech make a thing out of make a tribute to make allowances for make an agreement make an example of make an impact on make believe make better use of make contributions to make ends meet make faces make for sb make for make friends with make friends make fun of make history make it make jokes about make kites make light of make mistakes make models make noise make of make of sth make off make out make peace with sb. make peace make progress make sb up make sense make sketches of make sth do make sth of make sth up make sure make the acquaintance of make the bed make the best of a bad job make the best of make the difference make the grade make the most of make time make trouble make up for sth make up for make up of make up make use of make way for make way man in the street manage to do many a map out marco polo Margaret Mitchell Marie Curie marine scientist mark off mark out mark up martial art martial arts Martin Luther King, Jr mass production mass transportation math book math problem maths class may as well May Day mean business measure up Medecins Sans Frontieres medicine man mediterranean sea memorial hall merit and demerit Merry Christmas! mess about metal detector methyl cyanide microwave oven migratory bird milk shake mineral water mink coat mistake for modus operandi Mona Lisa monarch butterfly moon cake moral education more and more more often than not more specifically more than Mount Etna Mount Kilauea Mount Qomolangma Mount Tai mountain range movie star movie theater MP3 player much as muddle along music class musical composition musical instrument nail down name after name tag national anthem National Day national flag Native American Native Canadian native to (the west) natural balance nature park nature reserve nautical mile New Year New Zealand news coverage newspaper stand Niagara Falls Nicolaus Copernicus night and day Night Safari no less than no more than no sooner than no talking no way none other than Norfolk Broads North America Northern Ireland nose about not at all not any longer not any more not anymore not at all not have a leg to stand on not in the least not necessarily not only but also not so much as not to say Notre Dame Cathedral now and again sometimes now and again now and then now that nowhere near nuclear energy nucleic acid null and void oak tree odds and ends of a kind of all time of late of no account of special note of the day off and on off balance off the air Oh dear oil painting Olympic Games on a daily basis on a diet on a farm on a large scale on a scale on a small scale on account of on account to on and off on and on on average on behalf of on board on condition that on demand on display on earth on guard on hand on hard times on holiday on land on loan on no account on oath on occasion on one hand on paper on sale on Sunday afternoon on that basis on that score on the air on the alert on the average on the basis of on the battlefield on the contrary on the heavy side on the increase on the one hand on the other band on the other hand on the part of on the road to on the road on the table on the urban scene on their way on vacation on various occasions once a week once again once and for all once for all once in a while once upon a time one after another one another one day one way or another only a little only that oolong tea open an account open day opera house operational mine or whatever orange juice order of magnitude organ donor organic food orientate oneself original version originate from other than out of action out of breath out of character out of date out of hand out of place out of practice out of season out of the ordinary out of the way outdoor activity outer space over and above over and over again over and over over millennia ozone layer P.E. class pace off pack away pack in pack off pack up to put pack up package tour packing case paint pictures palm off paper chain paper clip paper cut papua new guinea Pardon me parking lot part and parcel part company with part of speech part with participate in pass away pass by pass off as pass off pass on pass out pass over pass sth back pass the time of day with pass the time pass up pass way passive voice pat on the back patch up pave the way for pay attention to pay back pay close heed to pay for pay off pay out pay phone pay up peace pipe peace table peak season peat bog peking opera pen pal penal colony pencil case pencil sharpener per capita perform a role perform onstage periodic reversal permeate through personal conferences perspective glass persuade sb to do pertain to Peter the Great phase in phase out physical decay physical education pick at pick up leaves Pilatus Porter pivotal figure places of interest plain clothes plant house plant trees plastered with plate glass plate tectonics play a part in play a part play a role in play a trick play against play an important role play at play back play badminton play basketball play chess play computer games play down play football play for time play in the school band play it safe play jokes on play off against play on play piano play soccer play sports play the drum play the flute play the piano play the violin play tricks on play with fire play with snow play with plead for sb plead guilty plead not guilty point of departure poke about poke fun at polar bear polar region poles apart police station political favor pop chart positive and negative effects post card postage stamp Potala Palace potato chips power boating power failure power plant power station practical joke Practice makes perfect practice the piano praying mantis press coverage primary concern primary school printed matter private industry process of making a road prodigal son pros and cons provided that public amenities public land policy public relations public transit pull apart pull forward push ahead with push around put a premium on put across put an end to put aside put another way put away put away the clothes put back put forward put in a good word for put in place put into jail put into practice put the interests of ahead of put to death qualify as quantities of quarry operation quarter century quick as a flash quite a bit quite a few quite a lot of quite a lot quotation mark racial discrimination radio astronomer radio frequency radio station rag paper railroad industry railway station rain cats and dogs rain forest raise money range from to rat race rather than raw material raw sewage reach its peak reach out reaction to read a book read a magazine read books read stories reading room ready market real estate record player red cedar red date red packet refer to as reflective glass reflective tape refrain from regard as regardless of relate to relative size relative speed relative to relay race relevant to REM (rapid eye movement) renew a friendship repair shop replace with report card reproductive capability residential lot resist temptation revolve around rhetorical question ride a bike right after right away ring back rise above rise to the occasion River Thames roast beef rock and roll rocking chair roller coaster roller skate roller skates roller skating rough hands Rudyard Kipling run a race run across run after run away run away with run parallel to run up against running race rust away safari park safe and sound sahara desert sail through sailing boat sale price sales reps salicylic acid San Francisco Santa Claus satellite city save for save from save up say goodbye to say thanks to say to oneself scale down scale up scarcely when scat singing scholarly attainment school bag school day scrape by scrape together sea anemone sea food sea horse sea level seal of seal off seal up search engine search for seat belt secondary school see a flower show see about see an art show see dinosaurs see elephants see wild animals See you later seeing that seek after send a short message send away sense organ serve as set a record set about set about sth set against set apart set aside set at set back set sail set the pace set the stage for set the table sewing machine shade in shake down shake hands shake off shake up Shall we Shaolin Temple shape up share with Shetland Islands shoot at shop assistant shopping mall short hair shout at shut away shy away from sign away sign language Simba the Lion King Sir Ernest Shackleton sit around slap around slap down sleep late sleeping bag Sleeping Beauty slip away snack bar snake charmer snap at snap out of snap out of it snap up so as to so far so long as so that so to speak soak up soap opera soccer ball social climber social concerns social science social studies social worker solar astronomer solar energy solar system some day soon after sooner or later soundly asleep sounds great South Africa south america South China soy sauce soya bean soya milk soya sauce space agency space out space shuttle space station spare part speak for speak of speak out speak to special effect sperm whale spinal cord sports day sports star spray can spread out Spring Festival square off square root square up squatter area squirrel away St Lawrence River stab in the back stamp out stand a chance of stand a chance stand at stand by stand down stand for stand in line stand in stand off stand out stand up for stand up to stand up standards of admission star in star sign stare at stare up at start from scratch start off start on start out start up Statue of Liberty stay away from stay in bed stay put stay up late stay up steam engine steam up steer clear of Stewart Island stick around stick at still life arrangement stock exchange stomach ache Stone Age stone deaf straight ahead straight away straight off strike back string along struggle against Student of the Year study for a test stunt man styling wax subject matter subject of much debate substitute A for B subway station such as suffice it to say that sugar cube sum total summer camp supporting actress swarm of swear by swear in swear off Sydney Harbour Bridge Sydney Opera House table manners table salt table tennis tae kwon do tag along tag question tail off Taj Mahal take (photograph) take a bath take (transport) take a breathe take a chance take a delight in take a fancy to take a hand in take a look take a message take a photo take a rest take a seat take a shower take a step take a trip take a vacation take a walk take account of take advantage of take after take an interest in take apart take as take away take back take by surprise take care of take care take charge of take charge take control of take cover take delight in take down take effect take exception to take exercise take for granted take for take from take gamble take good care of take heart from take heart take hold of take hold take in take into account take into consideration take issue with take it easy take lying down take measures take medicine take note of take notice of take off take notes take on take out the garbage take out take over take pains take part (in) take part in take part(in) take photos take pictures take place take possession of take pride in take risks take root take shape take some medicine take sth into account take stock of take the place of take the plunge take to court take to heart take to sb take to sth take to task take to take turns take up take with a pinch of salt take with taken in this sense talent show talk about talk back talk down to talk into talk of talk on the phone talk out of talk over talk sense talk show talk to tally book tangle with tape recorder target organ tax inspector taxi driver taxi rank team player team spirit team up with tear at tear away tear down tear into tear up technological base teddy bear Teen Talk tell a lie tell apart temple fair Temple of Heaven Ten commandments tennis racket tens of thousands of terraced houses than before than ever thank God Thank goodness! thank goodness thank you thanks for thanks to Thanksgiving Day that is to say the accused the Alps the Amazon Jungle the Andes the Antarctic the Arctic Circle the Baltic Sea the Bering Strait the Conservative Party the Danube River the day after tomorrow the day before yesterday the Dead Sea the Deutsche Mark the Dragon Boat Festival the Faroe Islands The Foundation the Great Hall of the People the Great Lakes the Great Wall of China the Great Wall the human race the Indian Ocean the Lantern Festival the media the Milky Way the Ministry of Education the Mogao Caves the moment that the Olympic Games the other day the overwhelming majority the Pacific Islands the Pacific the Palace Museum the Parana River the Pearl River the Potala Palace the present day the rank and file the Renaissance the Rocky Mountains the same as the same to the Shaolin Temple the Six Banyan Temple the solar system the spot of earth the Summer Palace the Temple of Heaven the Terracotta Warriors the Trojans the U.S.A the Union Jack the United States the warriors the Water Festival the World Cup Final theater critic theme park theory of probability there and then there are think about think back to this afternoon this way thousands of three quarters through and through through thick and thin throw away tick away tidy away tiger shark time after time time and again tin can tip the scales at to a certain extent to a day to a great degree to advantage to all appearances to all intents and purposes to date to death to say nothing of to say the least to spare to start with to the contrary to the effect that toilet paper tomato paste too many tooth wear Tour de France tourist attraction toy car toy train track down track record trade in trade on traffic jam traffic light traffic lights traffic rule trail along trail dust trail off train driver train station transform into transit line translate into trash bin trash can travel agency travel agent travel package travel plans treasury department treat of treat or trick Tree Planting Day trick or treat Tropic of Cancer Tsinghua University tuck away tug of war turn a blind eye to turn a deaf ear turn around turn aside turn away turn back turn over a new leaf turn the tables TV station unaided eye unbound hair uncountable noun under favorable conditions under no circumstances under repair under the circumstances under the name of under the umbrella of under the weather under way United Nations united states up against up and down up in the air up to date up to scratch urban sprawl use a computer vantage point vary from to vending machine vice versa video camera video game video tape view as virtual reality visit grandparents visit the library visual illusion vocal chord vocational school volcanic vent volleyball game wad up wag its tail wait a moment wait for wait in line wake up to wake up walk away with walk out walk the dog walk through walking stick ward off warm to warm up warn of wary of wash away wash clothes wash face wash the clothes wash the dishes wash the windows wash up Washington D.C. Washington, D.C. waste away waste disposal watch a soccer match watch insects watch out for watch out watch over watch TV water bottle water heater water ski water slide water sports water the flowers water the plants wave aside wear and tear wear off wear out weather report web page Welcome aboard West Germany West Lake Road west lake West Pacific Ocean Westminster Abbey What a nice What a vision! what about what for what if what is more what is worse what of what time what would you like wide awake wide of the mark win a victory win approval win back wipe away with a view to with abandon with an eye for with good grace with one accord with regard to within reason without fail work at work on the idea of works of art World Trade Center worry about would rather than would rather would you ,please wrap up write a letter write a report writing paper Xiangshan Park yard sale year after year year(s) old years old Yellow Mountain You are welcome yours faithfully Youth League zebra crossing Zig Zag

中文词源


a 一 (个)

不定冠词an在发展过程中出现的缩略形式,应用于首字母为辅音的单词及h发音单词。

英文词源


a
a: [OE] The indefinite article in English is ultimately identical with the word one (as is the case, even more obviously, in other European languages – French un, German ein, and so on). The ancestor of both a(n) and one was ān, with a long vowel, but in the Old English period it was chiefly used for the numeral; where we would use a(n), the Anglo-Saxons tended not to use an article at all. Ān begins to emerge as the indefinite article in the middle of the 12th century, and it was not long before, in that relatively unemphatic linguistic environment, its vowel became weakened and shortened, giving an.

And at about the same time the distinction between an and a began to develop, although this was a slow process; until 1300 an was still often used before consonants, and right up to 1600 and beyond it was common before all words beginning with h, such as house.

=> one
a (1)
indefinite article, mid-12c., a variation of Old English an (see an) in which the -n- began to disappear before consonants, a process mostly complete by mid-14c. The -n- also was retained before words beginning with a sounded -h- until c. 1600; it still is retained by many writers before unaccented syllables in h- or (e)u-, but is now no longer normally spoken as such. The -n- also lingered (especially in southern England dialect) before -w- and -y- through 15c.
a (2)
as in twice a day, etc., from Old English an "on," in this case "on each." The sense was extended from time to measure, price, place, etc. The habit of tacking a onto a gerund (as in a-hunting we will go) died out 18c.

双语例句


1. Liver and kidney are particularly rich in vitamin A.
肝脏和肾脏富含维生素A

来自柯林斯例句

2. Details are available from the Hon. Sec. A.R. Bushby.
详情可咨询名誉秘书A.R.布什比。

来自柯林斯例句

3. I was assigned to Troop A of the 10th Cavalry.
我被派往第10骑兵队的A连。

来自柯林斯例句

4. Passes are graded from "A" down to "E".
及格分为A到E几等。

来自柯林斯例句

5. Use only clean, Grade A, perfect eggs.
只用表面干净、无磕碰的A级鸡蛋。

来自柯林斯例句