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| aircraft engine emission The formation and discharge of gaseous and particulate pollutants into the environment, especially the stratosphere, chiefly from airplanes, helicopters and other high-altitude aircrafts (形成气状与粒状污染物并将其排放至环境中，尤其是平流层中；主要来自飞机、直升飞机和其他高空航空器。) | |||
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