中国已经在全国范围内建立了一个PM 2.5监测网络，此举是为了加快减轻空气污染和减少欺诈性数据。

China has established a network to monitor PM 2.5 levels nationwide, in a move meant to hasten the reduction of the country's air pollution and cut down on fraudulent data.

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一个高效的厨房通风罩适合你的烹饪需求和能力的范围可以帮助减少这些量的室内空气污染物中发现你的家。

An efficient kitchen ventilation hood that fits your cooking needs and the capacity of your range can help minimize the amount of these indoor air pollutants found in your home.

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在本项论述中，信函作者的结论是，全球性水与大气污染已致使世界范围内两栖动物的数量减少。

In this argument, the writer of the letter concludes that global pollution of water and air has caused a decline in the number of amphibians worldwide.

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