我对他生意上的事一概不知道。

I knew nothing of his business dealings.

《牛津词典》

她自称不知道丈夫生意上的顾虑。

She disclaims any knowledge of her husband's business concerns.

《柯林斯英汉双解大词典》

你知道世界上最小的五个国家都在欧洲吗？

Do you know five of the smallest countries of the world are in Europe?

youdao

John Milton has made a mistake. He's made a literary mistake and, as I think all editors know, Spenser does not.

约翰·弥尔顿犯下了一个错误，他犯下了一个文学上的错误，而且我认为所有的编辑都知道，这个错误斯潘塞没犯过。

耶鲁公开课 - 弥尔顿课程节选

I chose English Literature because when I started off a university, I didn't know what it was I wanted to do.

我选英语文学是因为当我刚上大学的时候，我不知道自己到底想做什么。

为何选那门专业？ - SpeakingMax英语口语达人

So, doing those probability density dot graphs, we can get an idea of the shape of those orbitals, we know that they're spherically symmetrical.

概率密度点图上,我们可以对这些轨道的形状，有个大概了解,我们知道它们是球，对称的,我们今天不讲。

麻省理工公开课 - 化学原理课程节选