"I've always loved working with the robots. And when I first started it was a challenge working with the robots, understanding how they worked and figuring them out.

VOA: special.2010.07.28

I have trouble understanding them

我有困难理解他们的课，

热情的教授 - SpeakingMax英语口语达人

In bridge building we're well advanced in understanding what are the problems with building bridges and how do we overcome them?

在桥梁建设中我们十分清楚地了解,在造桥的过程中会遇到什么问题,以及如何克服这些问题

耶鲁公开课 - 生物医学工程探索课程节选

And it gives them a better understanding of themselves.

VOA: special.2010.06.28

You should be able to maybe print out a blank copy of those notes from the website not for memorizing them, but now just understanding how the photoelectric effect works.

你们应该可以从网站上打印一份,这些笔记中的空白的纸张,不仅仅是为了记忆，而且现在要理解,光电效应是如何工作的。

麻省理工公开课 - 化学原理课程节选

Object permanence is the understanding that things exist when you no longer see them.

客体永存性是指,知道某人或某物虽然现在看不见,但仍然是存在的

耶鲁公开课 - 心理学导论课程节选