Why did you do that, you cretin?

你为什么这样做，你这个傻瓜？

《牛津词典》

And why did you do that?

为什么你要那么做？

youdao

That's police work. Why did you do that?

这是警察的事。你们为什么这样做？

youdao

When President Levin or Barry Nalebuff who is now walking to the back of the room, when my boss comes along and asks me why did you do that?

当校长列文或者巴里·纳莱巴夫来找我,他们二位就坐在教室后面呢,当他们问我为什么这么选时

耶鲁公开课 - 博弈论课程节选

Why did you do that?

问我有没有理由的时候

耶鲁公开课 - 博弈论课程节选

I think we all know what it's like, actually, just watching yourself retaliate against somebody because you're angry and stop wondering why did I do that.

我想我们都深有体会，看着自己与某人作对，复仇,因为出于愤怒,而不再思考究竟是为了什么。

普林斯顿公开课 - 人性课程节选

But he gained from it, which makes you wonder, you know, who - how - why did the devil do that?

NPR: Singer and Songwriter Neil Young