any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes;
多种相关软体小动物,特别是环虫类、毛颚类、线虫类和扁形虫类;
any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes;
多种相关软体小动物,特别是环虫类、毛颚类、线虫类和扁形虫类;
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