So those are the three pieces and the issues there had to do with musical genre that we're going to talk a little bit more about in a moment, and the instruments.

就是这三首乐曲,与它们的音乐风格相关的知识,我们接下来会进一步探讨,还有关于乐器的知识

耶鲁公开课 - 聆听音乐课程节选