And fairly soon into the conversation I demonstrated some principle that you've probably learned in your physics class having to do with an object at rest remaining at rest unless acted upon by a force.

很快，在交谈中,我就展示了一些原理,可能你们在物理课上学过,要使静止的物体保持静止,必须有外力作用。

耶鲁公开课 - 心理学导论课程节选

Yes, I have. Freshman year, I was having a lot of trouble in my Physics class, and

是的。大一那年，我在物理课上遇到了很多难题，

与教授的面谈 - SpeakingMax英语口语达人