two heads are better than one.

1、一个好汉三个帮。

two of a trade seldom agree.

2、同行是冤家。

two wrongs do not make a right.

3、别人错了，不等于你对了。

unity is strength.

4、团结就是力量。

unpleasant advice is a good medicine.

5、忠言逆耳利于行。

until all is over one‘s ambition never dies.

6、不到黄河心不死。

venture a small fish to catch a great one.

7、吃小亏占大便宜。

virtue is fairer far than beauty.

8、美德远远胜过美貌。

walls have ears.

9、小心隔墙有耳。

wash your dirty linen at home.

10、家丑不可外扬。