“可是我不知道，”他说，“谁也不知道！”

"But I do not know it," said he, "and no one knows it!"

youdao

直到今天，我仍然不知道是什么跟着我回家，但我很害怕，我宁愿不知道。

To this day, I still have no idea what followed me home but I was terrified and I'd rather not find out.

youdao

“我出去的时候不知道我要去哪里，也不知道我要做什么。”卡特告诉福克斯新闻网。“可是我相信这些先生。”他说。

"I went out not knowing where I was going or what I was going to be working on," Carter told FoxNews.com. "But I trusted these gentlemen," he said.

youdao

And I don't know why, but since time immemorial that is the way computer scientists have drawn trees.

叶子是在最下面的，我不知道为什么,但从记事以来他们就是这么画树的,这也许就是为什么我们。

麻省理工公开课 - 计算机科学及编程导论课程节选

It's called, I don't know if you guys speak any Japanese, but it's called Bungo, the thing that we're focusing on.

我不知道你们是否会日语，但我们主要学习的东西被称作“豊后”。

最喜欢的一门课 - SpeakingMax英语口语达人

I really have no idea whether it's a fact, and it's not important in My Fair Lady whether it's a fact.

我真的不知道这是不是真的，但是它在窈窕淑女里面真实与否并不重要。

耶鲁公开课 - 文学理论导论课程节选