A lot of music is made up of these two-four and four-four sorts of aggregates.

很多乐曲是由,这些二四拍和四四拍的小节组合而成的

耶鲁公开课 - 聆听音乐课程节选

So what we want to do now is to begin to think about counting measures, and we're going to do this by staying with this piece of Louis Armstrong here, and we need to be able to count measures so that we can figure out the syntax of music.

现在我们想做的,是大家开始想一下怎么数小节,我们通过,路易斯·阿姆斯特朗的这段乐曲,来做这个活动,我们需要能够数好小节才能弄清楚,音乐的句法

耶鲁公开课 - 聆听音乐课程节选