So let's listen to a little bit of this music and I want you, maybe as a group to tap with your foot, your hand whatever, just the beat as you hear it.

我们一起来听一下,我希望你们也许以组为单位,一起用脚打拍,拍手,随你喜欢,一起打拍子

耶鲁公开课 - 聆听音乐课程节选

So what I've said so far is, a particle moving in time from point to point can be represented by a graph, x versus t.

到目前为止,我说过,一个质点随时间的连续运动,可以用一幅x-t图来表示

耶鲁公开课 - 基础物理课程节选