1. One must investigate the change in environmental quality, propose the remedial measures for adverse effects, calculate the relationship between benefits and costs, and see whether the environmental change is beneficial and acceptable. 
   其目的在研究对每一个单因子的影响。因而必须研究环境质量改变，对不利影响提出对策措施，计算投资、效益关系;以研究环境改变是否有利，能否接受。
2. environmental quality comprehensive assessment 
   环境质量综合评价
3. marine environmental quality assessment 
   海洋环境质量评价
4. urban environmental quality assessment 
   城市环境质量评价
5. quality assurance for environmental monitoring 
   环境监测质量保证

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