1. at the best
至多，充其量;
[例句]Rugby's a rough game at the best of times
即使是在比赛最不激烈的时候，橄榄球也是一种粗野的运动。
2. by chance
碰巧;偶然地，意外地;无意之中;偏巧;
[例句]I met her by chance on the street.
我恰巧在街上遇到了她。
3. in conclusion
最后，综上所述;
[例句]In conclusion, more theoretical and experimental research must be conducted.
总之，必须进一步开展理论和试验研究。
4. on condition that
若是…，以…为条件;
[例句]He spoke to reporters on condition that he was not identified.
在不披露身份的条件下，他接受了记者的采访。
5. in confidence
秘密地，暗中;
[例句]We told you all these things in confidence
我们告诉你的这些事都需要保密。
6. in connection with
与…有关，连同;
[例句]13 men have been questioned in connection with the murder.
有13名男子因谋杀案受到盘问。
7. in consequence
由于;结果;因此;因为…的缘故;
[例句]Maternity services were to be reduced in consequence of falling birth rates.
由于出生率下降，产科服务会随之削减。
8. on the contrary
(与此)相反，正相反;反倒;反而;
[例句]On the contrary, this requirement interferes with its proper function.
相反，这一要求干扰了大学正常的功能。
9. in contrast with
相比之下;
[例句]In contrast with its surface fleet, Britain's submarine force was relatively small.
同其水面舰队相比，英国的潜艇部队规模相对较小。
10. out of control
失控;失去控制;不受控制;
[例句]My impression is that they are totally out of control
我的感觉是它们完全失去了控制。
11. under control
被控制住;处于控制之下;
[例句]The river was brought under control.
这条河给制服了。
12. at all costs
不惜任何代价;不惜工本;
[例句]We must find the missing document at all costs.
我们无论如何得找到丢失的文件。
13. at the cost of
以…为代价;
[例句]The lessons learned at the cost of blood helped to sober us.
血的教训使我们的头脑清醒了。
14. in the course of
在…期间，在…过程中;
[例句]New arts have been born in the course of the history of men.
在人类历史发展过程中不断产生新的艺术。
15. in danger
在危险中，有…的危险;
[例句]Your life is in danger
你的生命正处在危险中。
16. out of danger
脱离危险;
[例句]The patient was finally out of danger after the emergency treatment.
经过抢救，病人终于脱险。
17. out of date
过时的，陈旧的;年陈日久;老掉牙;
[例句]Think how rapidly medical knowledge has gone out of date in recent years.
想一想近些年医学知识更新得有多快。
18. up to date
至今;到目前为止;拥有(或包含)最新信息的;最新式的;现代化的;
[例句]We'll keep you up to date with any news
一有新消息我们就会告诉你。
19. in debt
欠债;
[例句]The survey claims loan companies prey on weak families already in debt.
这项调查声称信贷公司专对那些已经负债的弱势家庭下手。
20. in detail
详细地;
[例句]We examine the wording in detail before deciding on the final text.
我们彻底仔细地检查了措词后才最终定稿。
