本文依据灰色系统理论，采用灰色定权聚类方法，根据国家环境质量标准，对南京市近三年地表水的质量进行评估。
According to the National Standard of Environmental Quality, we analyzed and assessed the surface water quality in Nanjing in the recent three years.
环境质量标准、污染物排放标准分为国家标准和地方标准。
The environmental quality standards and pollutant discharge or emission standards are divided into state standards and local standards.
重点城市的空气和地面水达到国家规定的环境质量标准。
Air and surface water quality in major cities should meet both national and environmental quality standards.
到2000年底，47个重点城市的空气和地面水达到国家规定的环境质量标准。
The air and water in forty-seven important city will get to the national enviromental quality standard by the end of 2000.
到2000年底，47个重点城市的空气和地面水达到国家规定的环境质量标准。
Air and surface water quality in all urban districts in 47 major cities should meet related national standards by the end of 2000.
综述了美国及欧洲一些国家现行推导水生环境质量标准的方法研究。
Existing methodology for deriving aquatic environment including water quality standard, sediment quality standard for protecting aquatic environment of the USA and European Countries were reviewed.
第十条国家和地方水污染物排放标准的制定，应当将国家和地方海洋环境质量标准作为重要依据之一。
Article 10 In working out the national and local water pollutant discharge standards, the national and local marine environment quality standards shall be taken as one important basis.
第十条国家和地方水污染物排放标准的制定，应当将国家和地方海洋环境质量标准作为重要依据之一。
Article 10 In working out the national and local water pollutant discharge standards, the national and local marine environment quality standards shall be taken as one important basis.
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