I don't think we know exactly what's going to happen but it's certainly possible that we could get very sluggish growth over the next year or two and possibly even growth could stall out if it doesn't get underway,".

VOA: standard.2009.12.20

So hopefully, the first experiment he did, which I know that they certainly did do was maybe it's just background noise, right?

做的第一个实验，我相信他们肯定,是这样做的？

麻省理工公开课 - 化学原理课程节选

I don't know if that's true of you, but it certainly is true of people of my generation.

我不知道你们是不是也这样,但对于我们这代人来说确实如此

耶鲁公开课 - 古希腊历史简介课程节选

I don't know what it takes to replicate that in China, but I certainly hope one day there will be a place in China that looks like Silicon Valley.

无法想象如何在中国复制一个硅谷，但我希望在将来,中国会有类似硅谷的地方。

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, if you feel there's not enough math used, I guarantee you that I certainly know enough eventually to snow the whole class, but that's not the point.

如果你觉得我用的数学太少,我可以保证,我知道的数学知识,足以难倒在座的所有人,但这不是重点

耶鲁公开课 - 基础物理课程节选