At any instant, your motion, if it follows any curve, locally can be approximated as being part of some circle.

在任何时候,如果做曲线运动,都可以近似地认为是圆周的一部分

耶鲁公开课 - 基础物理课程节选

When you're driving in your car, there's a needle and the needle says 60; that's your velocity at this instant.

当你在开车时,有一根指针指着60,表示你这个时刻的速度

耶鲁公开课 - 基础物理课程节选

Now, it used to be in the old days before I had kids, I could list off 15 current movies and help you a bit more with your dating strategy by giving you instant movie reviews, but now I have kids, I get to see precisely two movies a year, and the two movies I got to see this year were The Bourne Ultimatum and the Good Shepherd.

在我有孩子之前,我能列出15部热映的影片,我还能给你们提供不错的影评,帮助各位制定约会策略,但是现在我当爸爸了,我每年只能看两部电影,我今年看的两部就是,《谍影重重》和《特工风云》

耶鲁公开课 - 博弈论课程节选