Suppose we all go to a tall building and start throwing things at various times and various speeds.

假设我们都爬上一栋高楼,在不同时刻以不同速度抛出物体

耶鲁公开课 - 基础物理课程节选

There is a tall building, a standard physics problem.

有一栋高楼,这是个标准的物理问题

耶鲁公开课 - 基础物理课程节选

An object falls off a tall building.

一个物体从一栋高楼上落下

耶鲁公开课 - 基础物理课程节选