stratosphere
/ˈstrætəʊsfɪə(r)/noun
1- the layer of the earth's atmosphere above the troposphere, extending to about 50 km above the earth's surface (the lower boundary of the mesosphere)平流层, 同温层。
1.1
- figurative the very highest levels of a profession or other sphere, or of prices or other quantities〈喻〉（职业或别的领域、价格或别的数量）最高档, 最高级; 最上层; 最高部位：
her next big campaign launched her into the fashion stratosphere.
她接下来的一个大型活动使她进入了时装界的上流阶层。
派生词