/ˈtrɒpəsfɪə(r) ||; ˈtropəˌsfɪr/noun [sing] the troposphere(technical术语) the lowest layer of the earth's atmosphere, between the surface of the earth and about 6 to 10 kilometres above the surface 对流层（地球大气层的最低一层，间于地球表面至地球表面以上约6到10公里处） ☞Compare ionosphere and stratosphere. 与ionosphere及stratosphere比较。