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。

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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。

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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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