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  1. biplane

    • IPA[ˈbʌɪpleɪn]

    英式

    • n.
      an early type of aircraft with two pairs of wings, one above the other.
    • noun: biplane, plural noun: biplanes

    • 更多解釋
    • IPA[ˈbīˌplān]

    美式

    • n.
      an early type of aircraft with two pairs of wings, one above the other.

    Oxford American Dictionary