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  1. Oxford American Dictionary

    inner tube

    • IPA[ˈinər ˌt(y)o͞ob]

    美式

    • n.
      a separate inflatable tube inside a pneumatic tire.；a large inflatable circular tube for riding on water or snow

    • noun: inner tube, plural noun: inner tubes

    • 釋義

    名詞

    • 1. a separate inflatable tube inside a pneumatic tire.
    • ▪ a large inflatable circular tube for riding on water or snow we cruised down the river on inner tubes