No, I don't know his number—I have quite enough trouble remembering my own.

不，我不知道他的号码，我光记自己的号码就够困难的了。

《牛津词典》

I don't envy the young ones who've become TV superstars and know no other world.

我不羡慕那些成为电视超级明星而对其他世界一无所知的年轻人。

《柯林斯英汉双解大词典》

No comment. I don't know anything.

无可奉告。我什么也不知道。

《柯林斯英汉双解大词典》

At times of crisis when everything is collapsed you know,there is no, people don't know where to go,"

VOA: standard.2010.01.20

So your TA might take a minute, so be patient with them if they see your structure and they say oh, no, no, no, no that's wrong, that's terrible, and they don't immediately know why.

因此助教可能需要一点时间，如果他们看到你画的路易斯结构以后说,噢，不，不，不，不，这是错的，错得离谱，而他们却不能立刻说出错在哪。

麻省理工公开课 - 化学原理课程节选

I don't know if you've seen this no-ad sunscreen for instance.

我不知道，举例来说，不知你见没见过这种无广告防晒霜。

广告和价格的关系 - SpeakingMax英语口语达人

No I don't know what you're looking for.

NPR: U.K.'s Arctic Monkeys Try to Win American Fans

' She said: 'No, we don't know'.

CNN: Duchess's 'slip' prompts speculation royal baby is a girl

Those who say that we are in a time when there are no heroes just don't know where to look.

CNN: Inaugural Address