劍橋詞典the layer of gases surrounding the earth at a height of between 15 and 50 kilometres that is not affected by the weather and in which the temperature increases with height 平流層，同溫層 During the 1980s, the amount of ozone in the stratosphere above Europe decreased by about eight percent . 20世紀80年代，歐洲上空平流層的臭氧含量降低了大約8%。 比較the exosphere the ionosphere the mesosphere the thermosphere the troposphere 習語go into the stratosphere 返回 the stratosphere