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- Percentage of the Water Quality Grades of the Yangtze River System 长江水系水质类别比例
- Percentages of the Water Quality Grades of the Hai River System 海河水系水质类别比例
- Percentages of the Water Quality Grades of the Huai River System 淮河水系水质类别比例
- Percentages of the Water Quality Grades of the Pearl River System 珠江水系水质类别比例
- percentage of Water Quality Grades in Liao River System 辽河水系水质类别比例
- water quality grade 水环境质量
- water quality grade recognition 水质等级识别
- Percentage of Water Quality Grades of Water Diversion Project (East Route) 南水北调(东线)水质类别比例
- Percentage of Water Quality Grades of the Seven Key River Systems in 2001 2001年度七大水系水质类别比例
- Who sets the standard for water quality? 水质标准由谁来制定?
- The plain water quality is very poor. 原水质很差。
- Water quality - Determination of cyanide index. 水质。氰化物指数的测定。
- Reveal long-term changes in water quality. 反映河溪水质的长期变化趋势。
- Water quality can deteriorate in the summer. 夏季时水质会变坏。
- See water quality solution above all. 首先看水质溶液。
- Conclusion: Water quality of the headwater is bad. 结论：该市农村水源水水质差。
- After a "rigorous" examination, the water quality of Qiantang River and three other rivers was rated Grade 2. 经过严格检测，钱塘江和三条其它江河的水质被评定为二类。
- percentages of the water quality grades of the Song Hua River system 松花江水系水质类别比例
- The water quality of the offshore marine areas tended to improve. 近岸海域海水水质呈改善趋势。
- Out of the 381 offshore monitoring points, 21.3 percent of the points reported that the marine water quality reached National Grade I, up by 7.9 percentage points. 381个近岸海域海水水质监测点中，达到国家一类海水水质标准的监测点占21.;3%25，比上年增加7
