A boaster and a liar are cousins-german.

吹牛与说谎本是同宗。

A bully is always a coward.

色厉内荏。

A burden of one's choice is not felt.

爱挑的担子不嫌重。

A candle lights others and consumes itself.

蜡烛照亮别人，却毁灭了自己。

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A cat has 9 lives.

猫有九条命。

A cat may look at a king.

人人平等。

A close mouth catches no flies.

病从口入。

A constant guest is never welcome.

常客令人厌。

Actions speak louder than words.

事实胜于雄辩。

Adversity leads to prosperity.

穷则思变。

Adversity makes a man wise, not rich.

逆境出人才。

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A fair death honors the whole life.

死得其所，流芳百世。

A faithful friend is hard to find.

知音难觅。

A fall into a pit, a gain in your wit.

吃一堑，长一智。

A fox may grow gray, but never good.

江山易改，本性难移。

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A friend in need is a friend indeed.

患难见真情。

A friend is easier lost than found.

得朋友难，失朋友易。

A friend is never known till a man has need.

需要之时方知友。

A friend without faults will never be found.

没有十全十美的朋友。

'After you' is good manners.

“您先请”是礼貌。

A good beginning is half done.

良好的开端是成功的一半。