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单词 sea cow
释义
sea cow
n.
Any of several large herbivorous marine mammals of the order Sirenia, having a paddlelike tail, forelimbs shaped like flippers, and no hind limbs, and including the manatee, the dugong, and Steller's sea cow (Hydrodamalis stelleri) of the northern Pacific, which became extinct in the late 1700s. Also called sirenian.
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