You've got to have a text and so we don't have--in eighty percent of classical music-- we don't have lyrics; we don't have a text.

你得有文字,而百分之八十的古典乐中却没有,没有歌词,没有文字

耶鲁公开课 - 聆听音乐课程节选

It gives a sense of what this music is all--really all about and since, as we were saying, so much classical music doesn't have a text with it we've got to have some markers in there to know what the composer is trying to communicate to us.

让我们了解这段音乐想表达什么，就像我说的，大部分古典音乐并没有文字注解，而我们需要一些标记,来告诉我们作曲家想用这段音乐告诉我们什么。

耶鲁公开课 - 聆听音乐课程节选