a member of the subphylum Vertebrata,a primary division of the phylum Chordata that includes the fishes,amphibians,reptiles,birds,and mammals,all of which are characterized by a segmented spinal column and a distinct,well-differentiated head
英
美
释义
脊椎动物,脊索动物门的一个原始分支,属于脊椎动物分门的一种动物,包括鱼类、两栖动物、爬行动物、鸟类和哺乳动物,其共同特征是都有节段的脊柱和很明显的、分化的头部
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