If you can't beat 'em join 'em。

不能打败他们，就加入他们。

If you do not like it you must lump it。

即使你不喜欢，也得忍受；逆来顺受。

If you want a thing well done, do it yourself。

欲事成当自为之。

If you want peace, prepare for war。

欲求和平，先准备战争。

Ignorance is bliss¹。

无知就是福。

Ill got, ill spent。

悖入悖出；不义之财，不可久享。

Ill news comes apace。

坏事传千里。

Imitation is the sincerest form of flattery。

模仿是最真挚的奉承。

In for a penny, in for a pound。

既已投下一便士，索性再花一英镑；一不做，二不休。

In union is strength。

团结就是力量。

It is a sad heart that never rejoices。

永无欢乐的心是可悲的；哀莫大于心死。

It's a small world。

人生何处不相逢；冤家路窄。

It is always darkest just before the day dawns。

黎明之前最为黑暗；否极泰来。

It's an ill bird that fouls² its own nest。

弄脏自己巢的鸟，不是好鸟；家丑不可外扬。

It's an ill wind that blows nobody good。

无人得到好处的风可真是坏风；凡事皆有利有弊。

It is as well to know which way the wind blows。

最好知道风吹往哪个方向；识时务者为俊杰。

It is best to be on the safe side。

小心谨慎为上策。

It is better to be alone than iin bad company。

交恶友不如无友。

It is better to die with honour than to live with shame。

光荣而死，好过含辱苟活。

It is better to do well than to say well。

说得好不如做得好。

It is better to give than to take。

施比受有福。

It is better to wear out than to rust³ out。

与其锈坏，不如用坏；与其闲死，不如忙死。

It is easier said than done。

说比做容易。

It is love that makes the world go round。

爱情使世界旋转。

It is more blessed to give than to receive。

施比受更有福。

It is no use crying over spilt milk。

打翻牛奶，哭也没用；覆水难收。

It is not how long but how well we live。

人生在于活得漂亮，而非活得长久。

It is the unexpected that always happens。

意外常常发生。