柯林斯英汉双解大词典

stratosphere /ˈstrætəˌsfɪə/

1.N-SINGThe stratosphere is the layer of the Earth's atmosphere which lies between 7 and 31 miles above the earth. 平流层; 同温层 ['the' N]

2.N-SING If you say that someone or something climbs or is sent into the stratosphere, you mean that they reach a very high level. 最高水平; 顶峰 [journalism]['the' N]