When you play the harmonica, you will often breathe in more air than you breathe out. This can make you feel dizzy.

吹奏口琴时，通常吸进的空气要比呼出的多，这就可能造成眩晕。

youdao

Thanks to our members for these excellent answers. By using different positions you can play in more than one key on the same harmonica.

感谢会员提供。同一把口琴，不同把位可以吹奏不同的调子。

youdao

Also, if you can sing a tune, then play it on the harmonica, then your musical performance will be more interesting.

当你会唱一首歌曲的时候，不妨试着用口琴吹奏；这样你的音乐表演将会更有趣。

youdao