It is simple in structure, small volume, light weight, long life and other excellent characteristics.

它具有结构简单、体积小、重量轻、使用寿命长等优异的特点。

youdao

It is simple in structure, small volume, light weight, long life and other excellent characteristics.

它具有结构简单、体积小、重量轻、使用寿命长等优异的特点。

youdao