Rhythm is simply these patterns, usually repeating patterns, of longs and short that get superimposed as they set up above the basic beat underneath.

节奏就是一些长短模式,通常是反复出现的,与下面的基本节拍叠加在一起

耶鲁公开课 - 聆听音乐课程节选

Then we had rhythms superimposed.

然后我们说到节奏

耶鲁公开课 - 聆听音乐课程节选