no secondary pollution

常见例句

When exposed to the air for more than 60 days, the product will turn into water with oxygen molecules and there will be no secondary pollution.
产品放置于自然环境中，60日后与氧分子结合又自动转化成清水，不会造成二次污染。
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The advantages of this technology are simple process flow, compact installation, no secondary pollution, low cost and wide range of application, etc.
该技术具有流程简单、占地面积小、无二次污染、费用低、应用范围广等特点。
Controlling environment pollution by biotechnology has the advantages of low cost and no secondary pollution.
应用生物技术治理环境污染，具有费用低、不产生二次污染的优点。