我不知道。不，我知道不假，但不打算告诉你。

I don't know. Correction—I do know, but I'm not going to tell you.

《牛津词典》

“不，我不知道，”老太婆说，“你也看不见！”

"Nay, I know not," said the woman, "and you cannot see!"

youdao

“不，你不知道，”他低声说。

"No you don't," he said, softly.

youdao

Specifically, what is it that American companies that, both then and now, still don't understand about China that you think you do and they don't?

美国公司对于中国的互联网行业，始终不甚了解,能否谈谈一些你知道而别人不知道的原因？

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

So they've got these superhighways which is, I don't know if you've seen them, they are marked on in blue.

所以，他们修了这些高速路，我不知道你见过没有，他们被标成蓝色了。

伦敦的蓝色自行车 - SpeakingMax英语口语达人

It's very exciting, but if you think you know everything you don't need to learn, you don't belong to us. I always need to learn.

这很令人兴奋，但如果你认为,你什么知道，你不需要学习了，那么请你退出百度，因为人总是在学习。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选