So this is all material for Yale students, Yale--material designed here at Yale for Yale students.

这些就是耶鲁学生使用的教材,在耶鲁大学为耶鲁学生编写的教材

耶鲁公开课 - 聆听音乐课程节选

So we have to--We get the textbook and then with the textbook we recommend getting access to this six-CD set.

我们拿到这教材,并且我推荐大家使用这6张一套的CD

耶鲁公开课 - 聆听音乐课程节选