三思而后行
Look before you leap.
三句不离本行
to talk shop
三个臭皮匠胜过一个诸葛亮
Two heads are better than one.
三番两次
This guy is at me time after time.(time and again; time and time again.)
三缄其口
You’d better hold your peace, or you’ll ask for trouble.
千钧一发
to hang by a hair thread / at the critical time
千锤百炼
A good nail does not fear the hammer. (steeled and tempered; gone through fire and water)
千载难逢
It only happens once in a blue moon. (It chances in an hour that happens not in seven years.)
千变万化
The unexpected always happens.
大刀阔斧
It’s said that the new executive will go the whole hog (reform in a big way.)
【笔记】at me：找我茬
ask for：要，要求，找
chance：偶然发生，碰巧，冒 ... (的险)
大同小异
much of muchness：The two articles are much of muchness ( be alike with minor difference ; There’s not a pin to choose between the two ) in appearance and quality.
大言不惭
blow your own trumpet：You really blow your own trumpet. (talk big; overshoot oneself)
大快朵颐
They are so delicious that I ate my fill. (gorge oneself; tuck in at; have/take one’s fill.)
大功告成
The big project finally came off with honors (bring home the bacon; come through with flying colors).
大智若愚
He who cannot play the fool is not a wise man.
大器晚成
Rome was not built in a day.
大海捞针
needle in a haystack：Finding your lost contact lens is just like looking for a needle in a haystack.
山穷水尽
at the end of one’s resources
山中无老虎，猴子称大王
Among the blind the one-eyed is king./When the cat’s away, the mice will pay.
小题大做
Make a mountain out of a molehill. ( fuss about trifles; a tempest in a teapot; a storm in a teacup; break a butterfly on a wheel )
【笔记】much of a muchness：大同小异very much the same
tuck：<俚>大吃，通常后面接away/in
come off：实现，发生
bring home the bacon：成功，也有养家糊口，谋生的意思
play the fool：干蠢事，演滑稽角色
contact lens：隐形眼镜
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