她对自己做过的事还没有表现出真正后悔的样子。

She has not shown any real regret for what she did.

《牛津词典》

做别人没想到的事，做别人从未做过的事——这是成功的关键。

Do what the others haven't thought of or do something that others have never tried before—that is the key to success.

youdao

我差点杀了人，并且仍对自己所做过的事感到内疚。

I almost killed someone and I still feel so guilty about what I did.

youdao

And the first thing you do is ask is it an instance of some problem that other people have already solved?

而且你以前从没碰过这个问题,你首先要做的一件事就是问问自己,这是不是一个别人已经解决了的问题？

麻省理工公开课 - 计算机科学及编程导论课程节选

Because it implies that it seems as if the person you are speaking with has never done that thing.

因为你在暗示跟你谈话的人似乎根本没做过那件事。

Do you ever课堂 - SpeakingMax英语口语达人

The passage is also famous because in it Milton does something that he almost never does. Milton has made a mistake.

这篇文章有名也是因为弥尔顿做了一些,他几乎从未做过的事，弥尔顿犯了一个错误。

耶鲁公开课 - 弥尔顿课程节选