由于此方法简单、快速、准确，并被推荐为有色金属行业标准。

This method is simple, rapid, accurate, and was recommended as the industry standard.

youdao

由于此方法简单、快速、准确，并被推荐为有色金属行业标准。

This method is simple, rapid, accurate, and was recommended as the industry standard.

youdao