Speaking of behavior, I have to maintain a fertile learning environment in here. We've got round numbers in excess of 400 people sitting here, so I expect certain things here, and that's how we're going to get along.

说到行为，我要维护一个良好的学习环境,我们的人数有点多,400人坐在这，所以，我期待一些事情，那就是我们相处的方式。

麻省理工公开课 - 固态化学导论课程节选

Round numbers, this is one angstrom.

取整数是一埃。

麻省理工公开课 - 固态化学导论课程节选

So the problem I want to do-- there are many things you could do but I just picked one, and this is the one with round numbers, so I can do it without a calculator.

我想讲的这道题,类似的题目很多,但我就选了其中一个,这道题涉及的数字都是整数,所以我不需要计算器

耶鲁公开课 - 基础物理课程节选