If you're unsure about that, check out, of course, chapter three in the textbook, where these issues are addressed.

当然,如果还不确定,可以看看课本的第三章,这些问题都提到了

耶鲁公开课 - 聆听音乐课程节选

Over the weekend, you were assigned material from chapter one of the text and it dealt really with three famous beginnings of pieces of classical music.

上周末,布置你们阅读的内容,出自课本第一章,那些内容是关于,三首著名古典曲目的开始部分

耶鲁公开课 - 聆听音乐课程节选