stratospheric
adjective uk/ˌstræt.əˈsfer.ɪk/ us/ˌstræt̬.əˈsfer.ɪk/
(OF ATMOSPHERE)
environment specialized平流层的，同温层的
relating to the stratosphere (= the layer of gases surrounding the earth at a height of between 15 and 50 kilometres)
stratospheric clouds 平流层的云
(HIGH)
informal极高的；非常的
very high or great
It's an amazing camera, but the price is stratospheric! 这是一部令人惊艳的相机，但是价格也极其高昂！
The project had proved a stratospheric success. 这一项目被证明极其成功。