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
The troposphere is where most weather phenomena, such as clouds, rain, and storms, occur.
对流层是大多数天气现象（如云、雨和风暴）发生的地方。
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。
