And in fact today, right now, we're going to move back the furthest we go, all the way into the nineteenth century to talk about the early Yeats.

实际上今天，现在，我们会回到很早的时候，直到十九世纪,来谈谈早期的叶芝。

耶鲁公开课 - 现代诗歌课程节选

But I can't go back to what it was like in the early days, just like you can't go back to what it was like to be four or three.

但再早之前的事情就记不得了，就像你想不起你三四岁时候的事情一样。

耶鲁公开课 - 死亡课程节选

Well,if you go back to the formation of musical notation from the ninth through the twelfth centuries we see that very early on these two dimensions of music the two axes of music that we talked about before pitch vertically and duration horizontally, are in place and we have these spots in this grid.

回顾一下从公元九世纪至二十世纪,音乐记谱法的历史形成过程,我们可以看出,音乐的两个维度,就是我们之前提到的音乐的两个轴,纵轴是音高,横轴是时值,在早期已经存在了,我们在这样的网格上用点记录

耶鲁公开课 - 聆听音乐课程节选