我不知道——我想，还是像往常一样让它留在这儿吧。

I don't know--leave it here as we've always done, I reckon.

youdao

发生了这样一件奇怪的事，这个好人不知道该说什么，想什么。

The good man knew not what to say or think at such an odd thing happening.

youdao

我想学英语，但我不知道怎么样学最好，所以我想请你给我一些建议。

I want to learn English but I don't know the best way to go about it, so I hope you can give me some suggestions.

youdao

I wonder have any of you reflected on, I don't want to call it shadow side, is not domesticated.

不知道你们有没有人想过这个问题，我不想说这是自然的阴暗面，无法驯化的一面。

普林斯顿公开课 - 人性课程节选

But if you say, well, I don't know how to do this, I am not going to bother, don't grade the paper.

但是如果你说，好吧，我不知道怎么做这个，我想麻烦，别给试卷评分。

麻省理工公开课 - 固态化学导论课程节选

But I want to end this first real class with a bit of humility as to what psychologists know and don't know.

最后,作为第一堂教学课的结束,我还是想对心理学家们知道什么,不知道什么,保持一种谦虚的态度

耶鲁公开课 - 心理学导论课程节选