And the fact of the matter is that rock and roll, which was invented within the lifetime of many of us.

事实上，我们很多人，见证了摇滚的诞生和发展。

普林斯顿公开课 - 人性课程节选

How many of you play in a rock band or have ever played in a rock band?

你们中有哪些参加了摇滚乐队的演出,或者曾经参加过摇滚乐队的

耶鲁公开课 - 聆听音乐课程节选