So, we know this point at one second is 20 meters, so let's just ask one other question and we'll stop.

我们知道该物体上升一秒后到达二十米处,关于这个模型的最后一个问题

耶鲁公开课 - 基础物理课程节选

Now this is when I want to stop for a second and I know that some of you, from past experience, are somewhat math phobic.

现在我们暂停一下,根据之前的教学经验,我知道有些人有数学恐惧症

耶鲁公开课 - 博弈论课程节选