We all know that in a falling elevator, you definitely do not escape the pull of gravity.

我们都知道在一个下坠的电梯里,你当然还是会受到重力的

耶鲁公开课 - 基础物理课程节选

I'm going to give the last class a problem which is pretty interesting, which is what happens to you when you have an elevator.

我将讲解最后一个例题,非常有趣,也就是当你在电梯里的情形

耶鲁公开课 - 基础物理课程节选