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the stratosphere

noun
🔊/ðə ˈstrætəsfɪə(r)/
🔊/ðə ˈstrætəsfɪr/
 [singular]Idioms
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  1. the layer of the earth’s atmosphere between about 10 and 50 kilometres above the surface of the earth平流层 compare ionosphereTopics Spacec2
Idioms
in/into the stratosphere (informal)
  1. at or to an extremely high level在（或到）极高水平
    • The technology boom sent share prices into the stratosphere.科技热潮使得股价飙升到极高的水平。🔊🔊