exosphere
US /ˈek.soʊ.sfɪr/
UK /ˈek.səʊ.sfɪər/
名词
外逸层, 散逸层
the outermost region of a planet's atmosphere, where the air is extremely thin and molecules can escape into space
示例:
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Satellites often orbit within the exosphere where there is very little atmospheric drag.
卫星通常在外逸层内运行，那里的大气阻力非常小。
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The exosphere is the final layer of Earth's atmosphere before reaching outer space.
外逸层是地球大气层到达外层空间之前的最后一层。