一次污染

primary pollution的用法和样例:

例句

  1. We should control the secondary pollution.我们应该控制二次污染。
  2. No wastewater release in manufacture procedure, remaining and soil assimilate after degradation, no second pollution formed.产品在生产过程中,无污水排出,降解后,残余物质与土壤同化,不会形成二次污染。

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