car·a·pace /ˈkærəˌpes/
  甲殼,殼
  Car·a·pace n.  Zool. The thick shell or shield which covers the back of the tortoise, or turtle, the crab, and other crustaceous animals.
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  carapace
       n : hard outer covering or case of certain organisms such as
           arthropods and turtles [syn: shell, cuticle]