A clade of protostome animals, based on molecular systematics, that includes the molluscs and annelid worms, together with the nemertines, bryozoans, rotifers, flatworms, and other wormlike phyla.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。