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  1. Oxford American Dictionary

    eardrum

    • IPA[ˈirˌdrəm]

    美式

    • n.
      the membrane of the middle ear, which vibrates in response to sound waves; the tympanic membrane.

    • noun: eardrum, plural noun: eardrums

    • 更多解釋

    eardrum

    • IPA[ˈɪədrʌm]

    英式

    • n.
      the membrane of the middle ear, which vibrates in response to sound waves; the tympanic membrane.

    Oxford Dictionary