Environmental quality evaluation system consists of many subsystems. It is a complex and multilevel system.
环境质量评价系统是由许多子系统组成的结构复杂、变量众多的多级递阶系统。
Grey clustering evaluation is a simple method in grade study of environmental quality.
灰色聚类评价是环境质量等级研究的一种简单易行的方法。
Water quality prediction is the basis of water environmental planning, evaluation and management.
水质预测是水环境规划、评价和管理工作的基础。
Water quality prediction is the basis of water environmental planning, evaluation and management.
水质预测是水环境规划、评价和管理工作的基础。
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