英语词汇relative pollution index怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	relative pollution index
释义	relative pollution index 简明释义相对污染指数网络释义 1 ?相对污染指数相对污染指数双语例句 1 Composite index analysis is based on the relative concentration of quality components in its environmental quality standards to judge the pollution levels of the water-quality status. 水环境质量评价指数法是根据水质组分浓度相对于其环境质量标准的大小来判断水的质量状况。
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