heavy impurity是什么意思

用法例句

Introduced a kind of new analysis method of the acid Zinc solution with serious pollution,this technology always use about by combination of the theories and production,the analysis method was investigated.

介绍了存在严重杂质干扰的酸性镀锌溶液的一种新型分析方法,通过理论与生产现场的有机结合,探索出的该分析方法步骤简便、快捷、消耗低、精度高,能适应快节奏的电镀生产的需要。