| Title | exosphere |
|---|---|
| Text |
Merriam-Webster's Collegiate Dictionary exo·sphere ETYMOLOGY International Scientific Vocabulary DATE 1949 : the outer fringe region of the atmosphere of the earth or a celestial body (as a planet) Oxford Advanced Learner's Dictionary-牛津双解-OALD7 exosphere exo·sphere / 5eksEusfiE(r); NAmE 5eksousfir / nounthe exosphere [sing.] the region near the edge of a planet's atmosphere 外层,外逸层(行星大气的最外层) Webster's Third New International Dictionary, Unabridged exo·sphere \ˈeksō+ˌ-\ noun Etymology: International Scientific Vocabulary exo- + sphere : the outer fringe region of the atmosphere variously estimated to begin at an altitude of 200 to 600 miles |
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