| 单词 | chordate |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔cephalochordate〕Any of various primitive chordate animals of the subphylum Cephalochordata, such as the lancet, that lack a true vertebral column.头索动物：头索动物亚门的一种原始脊索动物，如帆蜥鱼，无真正的脊柱美国传统〔enterocoele〕The coelom formed from a pocketlike outgrowth of the wall of the archenteron, especially in echinoderms and chordates.肠体腔：由原肠壁的袋装生长而形成的体腔，尤其存在于棘皮动物和脊索动物中美国传统〔mesomere〕The middle zone of the mesoderm of a chordate vertebrate embryo, from which excretory tissue develops.中胚叶节：脊索类脊椎动物胚胎的中胚层的中间部分，最终会发育成排泄组织美国传统〔notochord〕A flexible rodlike structure that forms the main support of the body in the lowest chordates, such as the lancelet; a primitive backbone.脊索：细胞构成的一条纵长可弯曲的杆状结构，其作用是引导产生神经板，形成躯体的支持轴美国传统〔urochordate〕A chordate marine animal of the subphylum Urochordata; a tunicate.尾索动物：尾索动物亚门的海生脊索动物；被囊动物美国传统 |
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