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  1. Oxford American Dictionary

    troposphere

    • IPA[ˈträpəˌsfir]

    美式

    • n.
      the lowest region of the atmosphere, extending from the earth's surface to a height of about 3.7–6.2 miles (6–10 km), which is the lower boundary of the stratosphere.

    • noun: troposphere

    • 更多解釋

    troposphere

    • IPA[ˈtrɒpəsfɪə]

    英式

    • n.
      the lowest region of the atmosphere, extending from the earth's surface to a height of ...

    Oxford Dictionary