患病的原因很可能是水污染。

The probable cause of the disease was water pollution.

显而易见的问题是水污染。

The obvious problem is water pollution.

但是,它们会造成污染,特别是对水的污染。

However, they cause pollution, especially to the water.

饮用水被铅污染了。

The drinking water has become contaminated with lead.

这些水被细菌污染了。

The water was infected with germs.

他非常担心土地和水会被污染。

He was very worried that the land ans water would be polluted.

水污染控制规划与GIS

Water pollution control planning and GIS

国家环保总局表示，二氧化硫排放量的下降，加之衡量水污染状况的化学需氧量（cod）指标也略有降低，表明强化污染治理工作取得“明显成效”。

Taken together with a small decline in recorded chemical oxygen demand, a water-pollution indicator, the SO2 fall showed the "clear results" of strengthened anti-pollution work, SEPA said.

NH+4和TN可作为农田水污染监测的主要氮素指标，NO-3作为辅助监测指标。

NH+ 4 and TN could be used as the main indexes for the water pollution of the paddy field, and NO-3 used as the assistant one.