I can't tell you who has done it.

我不能告诉你是谁干的。

youdao

I don't know who has done it, nor do I care.

我不知道是谁做了这件事，我也不在意。

youdao

I don't know of anybody who has done it right.

我不知道谁正确的完成了。

youdao

But before you do it, you want to find somebody who has done it before

但你真正尝试之前，你想先去找那些之前尝试过这些运动的人，

Have you 课堂 - SpeakingMax英语口语达人

What--So--And it was done by Elliot Aronson who has retired now, but for many years taught at the university of California CaSanta Cruz.

是艾伦特·埃利奥特,他现在已经退休,之前在加州大学圣克鲁兹分校教学多年。

耶鲁公开课 - 心理学导论课程节选

As anyone who has done it knows, selling and moving out of a house is a hassle.

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Follow the path of Jennifer L. Armentrout, who has done it just about as quickly as anyone could.

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But as Ireland's National Asset Management Agency known as NAMA picks up the pace of its sales efforts, a group of supporters is emerging in the real-estate industry who say it has done the best job possible, given the terrible hand it was dealt.

WSJ: Ireland 'Bad Bank' Tries to Make Good With Sales