英语词汇class of pollution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

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?污染等级
... classer 分级机 classes of pollution 污染等级 class F insulation F级绝缘 ...

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During the air pollution red alert, the Beijing Commission of Education ordered all kindergartens, primary schools and middle schools to suspend classes.
在空气污染红色预警期间，北京市教委下令让所有幼儿园、小学和中学停课。
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Based on the calculation and analysis of comprehensive index-polluted, shallow-seated groundwater in Dongtinghu district can be divided into 4 classes of serious, middle, lower and no pollution.
据综合污染指数计算分析，洞庭湖区域浅层地下水分为重度、中度、轻度和非污染4个等级。

单词	class of pollution
释义	class of pollution 简明释义污染等级网络释义 1 ?污染等级 ... classer 分级机 classes of pollution 污染等级 class F insulation F级绝缘 ... 双语例句 1 During the air pollution red alert, the Beijing Commission of Education ordered all kindergartens, primary schools and middle schools to suspend classes. 在空气污染红色预警期间，北京市教委下令让所有幼儿园、小学和中学停课。 2 Based on the calculation and analysis of comprehensive index-polluted, shallow-seated groundwater in Dongtinghu district can be divided into 4 classes of serious, middle, lower and no pollution. 据综合污染指数计算分析，洞庭湖区域浅层地下水分为重度、中度、轻度和非污染4个等级。
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