2. Until recently it was believed that frogs, salamanders, and caecilians—long
wormlike amphibians—all shared a common ancestor.
直到近来才认为青蛙,火蜥蜴和蚓螈—长蠕虫类两栖动物-都有一个共同的祖先。
3. Any of various worms or
wormlike animals of the phylum Annelida, characterized by an elongated, cylindrical, segmented body and including the earthworm and leech.
环节动物门的一种虫或似虫的动物,其特征为身体较长,呈圆柱形分节状,包括蚯蚓和水蛭。