你不知道为什么他们对你没有兴趣。

You don't know why they weren't interested in you.

youdao

有时候你不知道为什么你的小工具不工作，你想让它。

Sometimes you don't know why your gadget doesn't work as you want it to.

youdao

故事已经是老生常谈了，你不知道为什么作者还津津乐道？

The story has also been told already and often, and you have to wonder what drew the author to it.

youdao

If you don't know why you're about to eat cake like that you will soon, but you know this.

如果你现在还不知道为什么将要吃到那样的蛋糕,很快就会知道的，你清楚这一点。

哈佛公开课 - 计算机科学课程节选

And it makes you want to go get that insurance. I don't know why, but it does.

这让你想去买这家保险。我不知道为什么，但这就是这样。

广告泛滥 - SpeakingMax英语口语达人

You didn't know who wrote it, where, when, how, why, and someone says to you, "I want you to draw some conclusions about that piece of writing.

你不知道是谁，在哪里，什么时间，怎么样，为什么要写,然后你被要求对篇文章，做一个总结。

耶鲁公开课 - 旧约导论课程节选