接下来我们来介绍一下各种乐器，还有乐器产生声音的原理。

Let's go on now to talk about instruments and how instruments produce sound.

youdao

接下来我们来介绍一下各种乐器，还有乐器产生声音的原理。

Let's go on now to talk about instruments and how instruments produce sound.

youdao