人需要呼吸空气以维持生命。一个成年人每天呼吸大约2万多次，吸入空气达1

人需要呼吸空气以维持生命。一个成年人每天呼吸大约2万多次，吸入空气达15到20立方米。因此被污染了的空气对人体健康有直接的影响。

結果 (英文) 1:

People need to breathe air to sustain life. A day for adults breathe about 20,000 times, the inhaled air of 15-20 m3. Contaminated air has a direct impact on human health.

結果 (英文) 2:

People need air to maintain life.An adult day breathing about 20000 times, intake air amounts to 15 to 20 cubic meters.The polluted air on human health has a direct effect on.

結果 (英文) 3:

People need the air to breathe in order to maintain life. An adult breathing approximately more than 20,000 times a day, inhaling air 15 to 20 cubic metres. Polluted air have a direct impact on human health.