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  1. floating rib

    英式

    • n.
      any of the lower ribs which are not attached directly to the breastbone.
    • noun: floating rib, plural noun: floating ribs

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    • IPA[ˈflōdiNG rib]

    美式

    • n.
      any of the lower ribs which are not attached directly to the breastbone.

    Oxford American Dictionary