worms with cylindrical bodies segmented both internally and externally 同义词：annelid worm, segmented worm,
relating to or belonging to or characteristic of any worms of the phylum Annelida 同义词：annelidan,
例句与用法
1.
Standard guide for conducting sediment toxicity tests with marine and estuarine polychaetous annelids 用海洋和港湾多毛纲环节动物作沉积物毒性试验的标准导则
2.
Standard guide for conducting acute , chronic , and life - cycle aquatic toxicity tests with polychaetous annelids 用多毛纲环节动物做剧烈的慢性的及寿命周期水生动物毒性试验的标准指南
3.
As we all know , bilateral symmetry , three - layer embryo , metamerism and having a relatively developed head are the common characteristics of the arthropoda and annelida , so it is believed that arthropod originated from annelid 由于节肢动物具备环节动物两侧对称、三胚层、身体分节、头部较发达等特征，所以一般认为节肢动物起源于环节动物或类似环节动物的祖先。
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