1.A common danger causes common action.
同舟共济。

2.A contented mind is a continual / perpetual feast.
知足常乐。

3.A fall into the pit, a gain in your wit.
吃一堑，长一智。

4.A guest should suit the convenience of the host.
客随主便。

5.A letter from home is a priceless treasure.
家书抵万金。

6.All rivers run into the sea.
殊途同归。

7.All time is no time when it is past.
机不可失，时不再来。

8.An apple a day keeps the doctor away.
一日一个苹果，身体健康不求医。

9.As heroes think, so thought Bruce.
英雄所见略同。

10.A young idler, an old beggar.
少壮不努力，老大徒伤悲。

11.Behind the mountains there are people to be found.
天外有天，山外有山。

12.Bad luck often brings good luck.
塞翁失马，安知非福。

13.Bread is the stall of life.
面包是生命的支柱。

14.Business is business.
公事公办。

15.Clumsy birds have to start flying early.
笨鸟先飞。

16.Courtesy costs nothing.
礼多人不怪。

17.Custom makes all things easy.
习惯成自然。

18.Desire has no rest.
人的欲望无止境。

19.Difficult the first time, easy the second.
一回生，二回熟。

20.Do not change horses in mid-stream.
别在河流中间换马。