It has been a long time since I left Mengcheng for my home.
我离开蒙城回到家已经很长时间了。
The water supply of MengCheng county town had changed to groundwater source because Guo River's water was serious polluted since 1993.
由于水源涡河水质污染超标，蒙城县县城从1993年起已全部改用地下水源供水。
This article analyses the effect of water pollution to the circulation of the Mengcheng sluice, and puts forward the tactics of governing the water pollution.
文章分析了水污染对蒙城间运行的影响，提出了防治水污染的对策。
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