I didn't expect it to do this. If you understand why it did what it did, you're half way there.

这样运行的啊，如果你能弄明白为什么,它这么运行，你已经完成了差不多一半了。

麻省理工公开课 - 计算机科学及编程导论课程节选

the Dead Sea Scrolls.] And some of them date back to the fourth and third century .So do you understand now why everybody was so excited?

其中一些文卷甚至能够追溯到公元前,三四世纪，所以你们应该明白为什么这么令人兴奋了吧！

耶鲁公开课 - 旧约导论课程节选

Do you understand why we had to do this?

你知道为什么要这么做吗

耶鲁公开课 - 金融市场课程节选

We'll talk about some chemistry today, what DNA molecules are like, why they have the behavior that they do, and you need to understand this in order to understand how you manipulate DNA.

今天我们会谈到一些化学结构,比如DNA分子的形态,它们为什么会以这种形态存在,你必须先掌握这些,才能理解如何操控DNA

耶鲁公开课 - 生物医学工程探索课程节选