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the troposphere

noun
/ðə ˈtrɒpəsfɪə(r)/
/ðə ˈtrəʊpəsfɪr/, /ðə ˈtrɑːpəsfɪr/
[singular] (specialist)
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  1. the lowest layer of the earth’s atmosphere, between the surface of the earth and about 6–10 kilometres above the surface对流层(大气的最低层,在地球表面和 6 至 10 公里上空之间)Topics Spacec2
    Word Originearly 20th cent.: from Greek tropos ‘turning’ + sphere.

See also: the troposphere


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