我们对不了解的东西不能有所作为。

We don't know until we measure.

youdao

我们决定从头开始并对不了解的一切问题追根问底。

We decided to start from scratch and question everything.

youdao

旅行能使我们对不了解的人们有一个真切的了解，能超越对陌生人的间接印象。

Travel is how we put a face and a voice to the Other and step a little beyond our secondhand images of the alien.

youdao

But I also have a weakness for the less common mental disorders that I think tell us something really interesting about mental life.

但我对那些不太常见的心理障碍,也并不是非常了解,不过我倒认为这些不常见的心理障碍,却向我们展示了心理活动有意思的一面

耶鲁公开课 - 心理学导论课程节选

Mr. Carl Icahn: Yeah, I don't know much about currencies and I really don't get into something I don't know something about--or generally don't.

伊坎先生：不太了解货币领域的事情,我对某些东西没有深入的研究,我不知道关于--或者大体上不知道。

耶鲁公开课 - 金融市场课程节选

I don't know how much you've seen, but quite often the way you learned physics earlier on in high school is probably different from the way professional physicists think about it.

我不知道你们对物理有多少了解,但你们以前在高中所学的物理知识,和资深物理学家们的看法,常常是很不一样的

耶鲁公开课 - 基础物理课程节选