en·do·skel·e·ton /ˌɛndoˈskɛlətṇ/
內骨骼
en·do·skel·e·ton /ˌɛndoˈskɛlətṇ/ 名詞
內骨骼
En·do·skel·e·ton n. Anat. The bony, cartilaginous, or other internal framework of an animal, as distinguished from the exoskeleton.
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endoskeleton
n : the internal skeleton; bony and cartilaginous structure
(especially of vertebrates)