Cry for the moon.
海底捞月。
Custom is a second nature.
习惯是后天养成的。
Custom makes all things easy.
有个好习惯，事事皆不难。
Diamond cuts diamond.
强中自有强中手。
Do as the Romans do.
入乡随俗。
Do as you would be done by.
己所不欲，勿施于人。
Doing is better than saying.
与其挂在嘴上，不如落实在行动上。
Do it now.
机不可失，时不再来。
Do nothing by halves.
凡事不可半途而废。
Don't claim to know what you don't know.
不要不懂装懂。
Don't have too many irons in the fire.
不要揽事过多。
Don't make a mountain out of a molehill.
不要小题大做。
Don't put off till tomorrow what should be done today.
今日事，今日毕。
Don't put the cart before the horse.
不要本末倒置。
Don't trouble trouble until trouble troubles you.
不要自找麻烦。
Don't try to teach your grandmother to suck eggs.
不要班门弄斧。
Do well and have well.
善有善报。
Each bird love to hear himself sing.
孤芳自赏。
Early to bed and early to rise makes a man healthy, wealthy and wise.
早睡早起身体好。
Easier said than done.
说得容易，做得难。
Easy come, easy go.
来也匆匆，去也匆匆。
Eat to live, but not live to eat.
人吃饭是为了活着，但活着不是为了吃饭。
Empty vessels make the greatest sound.
实磨无声空磨响，满瓶不动半瓶摇。