Troposphere
01
对流层, 地球大气的最低层
the lowest layer of Earth's atmosphere, extending from the surface up to an average altitude of about 8-15 kilometers
例子
Commercial airplanes primarily operate within the troposphere, as it contains sufficient air for engines and passengers.
商用飞机主要在对流层内运行，因为它含有足够的空气供发动机和乘客使用。
