柯林斯英汉双解大词典
exosphere /ˈɛksəʊˌsfɪə/
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1.
N the outermost layer of the earth's atmosphere. It extends from about 400 km above the earth's surface 外逸层
双语例句
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Above the stratosphere, blue layers mark the upper atmosphere (including the mesosphere, thermosphere, ionosphere, and exosphere) as it gradually fades into the blackness of outer space.
在大气层上，蓝色的部分表示上层大气(包括中间层、热层、电离层、外逸层)，它们渐渐消逝到外空间的黑暗中。
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Last is the exosphere, which is the outermost layer of the atmosphere.
最后是散逸层，这是大气的最外层。
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The air density in the exosphere is so low that atoms and molecules can escape from it into interplanetary space.
外逸层中空气的密度非常小，以致原子和分子都能逃逸到星际空间。
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