1、depress
使抑郁;使沮喪;使消沉
I must admit the state of the country depresses me.
我必須承認國家的現狀讓我倍感沮喪。
I know he is too optimistic but I don't want to depress him.
我知道他太過樂觀了，但我不想令他灰心喪氣。
降低;減少
The stronger U.S. dollar depressed sales.
美元走強導致銷售額下降。
2、go back
追溯到；回溯到
The feud with the Catholics goes back to the 11th century.
與天主教的夙怨可以追溯到11世紀。
Our association with him goes back four years.
我們同他的合作是從4年前開始的。
回到（過去）；回顧
If you go back to 1960, you'll find that very few jobs were being created.
如果回到1960年，你會發現工作機會寥寥無幾。
3、entertain
使快樂；給…以娛樂；使有興趣
games and ideas to entertain children.
帶給孩子們快樂的游戲和想法
They were entertained by top singers, dancers and celebrities.
頂級歌手、舞蹈演員和名人們給他們帶來娛樂。
招待;款待
I don't like to entertain guests anymore.
我再也不想招待客人了。
You weren't allowed to entertain men in your rooms even with a chaperone.
即使你有監護人陪同，也不允許在房間里招待男性。
考慮，心存，懷有（主意、建議等）
I feel how foolish I am to entertain doubts.
我竟然心存懷疑，真是太愚蠢了。
I wouldn't entertain the idea of such an unsociable job.
我不會考慮從事這種不跟人打交道的工作。