The second short after the digital for pollution level date;

第二个短横后数字为污秽等级号；

The total pollution level of groundwater caused by the leachate is increasing.

渗沥液对地下水的总体污染程度正在加重。

Studies on dynamics of microcystin pollution level in municipal water supplies.

城市供水藻毒素污染水平的动态研究。

This product usage amount maybe regard as pollution level of cleaned clothing, appropriate changes in dosage.

本品用量可视待清洗衣物的污浊程度，酌情增减用量。

The result indicated the whole river was divided into several sections of different pollution level of water quality.

监测结果显示：整条江水质呈现出轻重不一的污染段面。