any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes;
多种相关的细长软体小动物，特别是环
类、毛颚类、线类和
类；
动物(低等蠕
,包括涡、血吸、猪肉绦等)any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes;
多种相关的细长软体小动物，特别是环类、毛颚类、线类和类；
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