等污染物的含量的英文

nox

• 等:    class; grade; rank
• 的:    4次方是 The fourth po ...
• 含量:    content

例句与用法

1. Since the contamination of the original water , the pollutant in the water such as organic substance , ammonia nitrogen , algae toxin , finally nitrate , pelagic microbe and so on , whose concentration and species are becoming higher and more , deteriorate the quality of drinking water seriously
   由于水源受到污染，水中的有机物、氨氮和硝酸盐氮、藻类及毒素、浮游动物等污染物的含量和种类不断增多，严重影响了饮用水水质。