So here's what we find, and as you can see there -is this bass rhythm moving slowly or quickly?

那么,大家能看到,这个低音节奏是缓慢还是迅速

耶鲁公开课 - 聆听音乐课程节选

but you can sort of tell that the particle is moving slowly or rapidly by looking at the space in between these tick marks.

但你可以通过观察计时点之间的距离,来判断该物体运动的快慢

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So your hand should be moving rather slowly. Let's all sing it.

你们的手应该移动的非常缓慢,大家一起唱

耶鲁公开课 - 聆听音乐课程节选