| 词汇 | exosphere |
| 释义 | exosphere noun environment specialized uk/ˈeks.əʊ.sfɪər/ us/ˈeks.oʊ.sfɪr/ the exosphere [ S ]（地球的）外逸层 the part of the earth's atmosphere that is farthest from the earth The temperature at the base of the exosphere is about 1300 K. Atoms of hydrogen, helium, sodium, potassium and calcium have been seen in the exosphere. See also: asthenospherethe atmospherebiospherehydrosphereionospherelithospheremesospherestratospherethermospheretroposphere |
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