Listen to how quickly Yeats modulates from one feeling, one image, to another in these really very short, quick, three-beat lines.

听一听叶芝是怎么快速地,从一种情绪，一个情景中，转换到另一个里去的,就在这些三音韵的短诗句中。

耶鲁公开课 - 现代诗歌课程节选

Then Chopin is sitting here and he modulates; he changes key. What about this?

然后肖邦这里徘徊了一下然后转调,他变调了,这个呢

耶鲁公开课 - 聆听音乐课程节选