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

I wanted to ask you about the role of your rock and roll band.

我还想问一下，摇滚乐队,在您的生活中扮演着什么角色？

普林斯顿公开课 - 人性课程节选