且安怀抱莫惆怅，瑶瑟调高尊酒深。

《落第书怀寄友人》是唐代罗邺创作的一首诗。以下是这首诗的中文译文、诗意和赏析：

清世谁能便陆沈，相逢休作忆山吟。
In this pure world, who can easily become successful? If we meet, let's not reminisce about our past mountain songs.

若教仙桂在平地，更有何人肯苦心。
If we could make the immortal laurel tree grow on level ground, who among us would be willing to work hard for it?

去国汉妃还似玉，亡家石氏岂无金。
Leaving one's country is like going from a queen to a mere piece of jade. Even a fallen family, like the Shi family, still possesses its own wealth.

且安怀抱莫惆怅，瑶瑟调高尊酒深。
Stay calm and content, don't worry or regret. Play the jade zither, raise the wine cup high.

这首诗抒发了诗人对世事的感慨和对个人遭遇的慰藉。诗中表达了诗人对清世难求的现实境遇的感叹，同时也提到了不甘心平庸的心情。诗人暗含了一种无奈，认识到世间合乎自己理想的太少，无论是功名利禄还是苦心追求仙境，都不是易事。诗的最后部分呼吁诗人自己要安心处世，不要烦恼和后悔，用音乐和酒来慰藉自己的心灵，表达了对自己的一种安慰和宽慰。

整首诗以简洁明了的语言表达了人生的微妙和诗人的内心纠结，展示了唐代诗人对自身人生境遇的思考和感慨，同时也留下了对人生追求的思索。