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

I don't know if there's anything in particular that you would like to know about it, but...

我不知道你有没有特别想了解的方面，但是……

在布莱恩公园 - SpeakingMax英语口语达人

I don't know if you know the story, but Labyrinth Books is independent, it's not a chain, and independent bookstores are trying-struggling--to survive.

不知道你们是否了解,"迷宫书店"家是独立书店 而非连锁书店,对于独立书店来说,生存下去非常艰难

耶鲁公开课 - 金融市场课程节选

I think the simple fact of the matter is we don't know enough about consciousness yet to know whether or not it can be explained in physical terms.

一个简单的事实就是,我们对于意识了解甚少,还不知道是否能使用物理的方式对其进行解释

耶鲁公开课 - 死亡课程节选

I don't know how much you've seen, but quite often the way you learned physics earlier on in high school is probably different from the way professional physicists think about it.

我不知道你们对物理有多少了解,但你们以前在高中所学的物理知识,和资深物理学家们的看法,常常是很不一样的

耶鲁公开课 - 基础物理课程节选

As shown in this cartoon here, again you don't need to know the details of this, but if you're interested in knowing what's the biological bases of the genetic code this is it.

像这个动画里画的那样,这里你也不需要了解细节,不过如果你很有兴趣想知道,遗传密码的生物学基础

耶鲁公开课 - 生物医学工程探索课程节选

I like to read because it helps me learn about other things I don't know.

我喜欢阅读，因为它让我了解了许多我不知道的事情。

It's important 实战 - SpeakingMax英语口语达人