You can feel something cooling off right. I mean simple examples of these happen when you you know, if you buy cold or hot packs.

可以立即反应的东西,你可以感到有的东西会冷却，对吧？,我是说，举个简单的例子。

麻省理工公开课 - 热力学与动力学课程节选

You never know when one of these could just do the trick.

你永远不会知道,里面的哪个正好是这样子的。

麻省理工公开课 - 固态化学导论课程节选

You're going to find out, you know, one of these years when you start teaching that when you get really close to a blackboard, you just cannot think.

过几年以后,你们渐渐就会发现,当你开始教课,当你离黑板真的很近的时候,你就没法思考了

耶鲁公开课 - 基础物理课程节选

One that seems to be in fashion these days, although you never know how long the fashion lasts, is: internal uprisings that somehow these monarchical areas, when life got tough, the people must have risen up against them.

有一个理论现在很流行,虽然不知道流行了多久,那就是认为,这些王国中起义的内部原因是,当民生困苦时,人们就必然奋起反抗

耶鲁公开课 - 古希腊历史简介课程节选

While I was there, many many of people said to me: look, we want you to succeed we believe you mind your doing, we know you have good intentions and we hate these people when they were in power, but we have to live here, t succeed, and many people have come here and not succeed before you.

当我在那边的时候，很多人对我说：,我们想要你成功，我们知道你很在意你所做的事，我们知道你是好意的，恨这些掌权的人，但是我们得在这里生活，如果你不能成功，在你之前也有很多人失败了，and，if，you，can’

普林斯顿公开课 - 国际座谈会课程节选