Stratosphere
n. 同温层, 最上层, 尖端的学科领域\\n[医] 同温层, 平流层
📖 牛津释义
stratosphere
n[sing]
layer of the earth's atmosphere between about 10 and 60 kilometres above the surface of the earth 平流层, 同温层（距地表约10至60公里之间的大气层）. Cf 参看 ionosphere.
🗣️ 情景例句
I need to be in the top percentage of my class to study abroad.
为出国留学，我的成绩必须在班里名列前茅。
A horse stumbles that has four legs.
人有失手日，马有失蹄时。
It was getting very windy in the hills.
山上还刮起了大风。