But there's this one phylum of worms, the annelids, that can re-grow unlike anything else that we've ever seen in the kingdom.

但有一类虫子——环节动门虫子——可以重新生长，不们在动界见的任何其它生。

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.

线虫门或环节动门的蠕虫具有某种体腔——体壁和消化道之间的充满液体的空间，有助运输营养质并与更复杂系统的发展相对应。