Most of our popular music, folk songs and things like that, are written in duple meter and in a major key.

大多数的流行音乐,民歌,以及类似的音乐,是写在二拍子和大调上面

耶鲁公开课 - 聆听音乐课程节选

Like in popular music there's often a couple of verses and a chorus and a bridge and you can predict each different movement of the piece, and that's more regular than-- Couldn't say it better myself.

就像在流行音乐中有很多的曲段，副歌,和过渡乐节，这样你就可以预测到音乐的每一个变化，这样就比别的要规则-,光我一个人不好说太细。

耶鲁公开课 - 聆听音乐课程节选