I don 't know too much about chromatic harmonicas .

对于半音阶口琴我了解的不多。

Some shops in china sell 10 hole harmonicas for around 20 rmb .

一些中国的商店以大约20元的价格出售10孔口琴。

The two harmonicas are just the same in quality and price .

两款口琴在价格和性能上是基本一致的。

Have you seen the longest and heaviest harmonicas in the world ?

您有看过世界上最长或最重的口琴吗？

The harmonicas play the skeleton keys and the rain .

口琴吹奏著骷髅的乐符以及雨水。