他问彼得凳子哪儿去了，彼得说不知道。

He asked Saint Peter what had become of the footstool, but he did not know.

youdao

他们回答说不知道他在哪儿。

They said they didn't know.

youdao

如果你说不知道，只能说明你在逃避。

If you say you don't know, that means you are shirking.

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 for me, I like to look at something and just say, "I like this. I don't really know why though."

但对我来说，我喜欢看着某个东西，然后说，“我喜欢这个。但我也不知道为什么。”

关于现代美术 - SpeakingMax英语口语达人

- "She lived unknown and few could know"-- how can she be unknown if few know anything about her?

她不为人知地活着，鲜有人知道她“,如果有任何人知道关于她的任何事情,又怎么能说他不为人知呢？

耶鲁公开课 - 文学理论导论课程节选