And I think there's that constant tussle going on in us Circumstances can push someone one way while another certain encouragement pushes more towards acting ethically.

在我们的内心时常会有这样的斗争,特定的环境促使我们选择漠视,同时，一些鼓励促使我们依照道德行事。

普林斯顿公开课 - 人性课程节选

One way is to just use your common sense and realize that if you push it this way, these two guys are going to move together.

第一种方法就是你可以通过常识感觉到,如果你这样推它,这两个物体会一起运动

耶鲁公开课 - 基础物理课程节选