三思而后行

Look before you leap。

三句不離本行

to talk shop

三個臭皮匠勝過一個諸葛亮

Two heads are better than one。

三番兩次

This guy is at me time after time。(time and again; time and time again。)

三緘其口

You'd better hold your peace, or you'll ask for trouble。

千鈞一發(fā)

to hang by a hair thread / at the critical time

千錘百煉

A good nail does not fear the hammer. (steeled and tempered; gone through fire and water)

千載難逢

It only happens once in a blue moon. (It chances in an hour that happens not in seven years。)

千變萬化

The unexpected always happens。

大刀闊斧

It's said that the new executive will go the whole hog (reform in a big way。)

小Car筆記：

at me：找我茬

ask for：要，要求，找

chance：偶然發(fā)生，碰巧，冒 ... (的險)【常用短語】①chance on 碰巧遇見， 偶然發(fā)現(xiàn) ②a fat chance n. <俚>微小的機會