重点词汇
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低级
low-level; inferior; basic; lower; vulgar; primary; elementary; rudimentary; low-class
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哺乳动物
mammal; mammalian
中英释义:
lower mammal
低级
low-level; inferior; basic; lower; vulgar; primary; elementary; rudimentary; low-class
哺乳动物
mammal; mammalian