The results indicated that there were twelve groups of soil fauna, Arthropoda,Mollusca,Annelida etc.
土
有
肢
、软体、
等12个目或类。
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Worms from the phylum Nematoda or the phylum Annelida have some sort of body cavity— a fluid-filled space between the body wall and the digestive tract that helps transport nutrients and corresponds to the development of more complex systems.
线虫门
动物门的蠕虫具有某种体腔——体壁和
化道之间的充满液体的空间，有助于
养物质并与更复杂系统的发展相对应。
