1. Pollution prevention work started full swing in key river valleys and regions.  
   重点流域和区域污染防治工作全面展开。
2. The major pollution indicators in the Yangtze River system are petroleum and ammonia nitrogen. 
   长江水系的主要污染指标是石油类、氨氮和高锰酸盐指数。与上年相比，水质持平。
3. To implement water pollution prevention programme of the Three Gorges Reservoir Area of the Yangtze River 
   实施长江三峡库区水污染防治规划
4. The order of the pollution for serious level to light level in the seven key river systems in 2001 is: Hai River, Liao River, Huai River, Huang River, Song Hua River, Yangtze River and Pearl River. 
   2001年度七大水系污染由重到轻的顺序依次是:海河、辽河、淮河、黄河、松花江、长江和珠江。
5. Efforts were concentrated on controlling pollution in key river valleys, regions, sea areas and cities. 
   集中力量对重点流域、区域、海域、城市的污染进行治理。

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• 1. 河流污染
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