1.A friend is best found in adversity.
患难见真情。

2.All rivers run into the sea.
殊途同归。

3.A small leak will sink a great ship.
千里之堤溃于蚁穴。

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

5.Experience teaches.
吃一堑，长一智。

6.Everybody's business in nobody's business.
三个和尚没水喝。

7.Never too late/old to learn.
活到老，学到老。

8.Nothing in the world is difficult for one who sets his mind to it.
世上无难事，只怕有心人。

9.No rose without a thorn.
没有不带刺的玫瑰。

10.No one can call back yesterday.
昨日不会重现。

11.No man can do two things at once.
一心不可二用。

12.No pains, no gains.
没有付出就没有收获/一分耕耘一分收获。

13.Never say die.
永不言败。

14.No way is impossible to courage.
勇士面前无险路。

15.A smooth sea never made a skillful mariner.
平静的大海决不能造就出熟练的水手。

16.Don't judge a book by its cover.
不要以貌取人。

17.Some thing is learned every time a book is opened.
开卷有益。

18.Strike while the iron is hot.
趁热打铁。

19.The car will find its way round the hill when it gets there.
车到山前必有路。

20.The heart is seen in wine.
酒后吐真言。