caterpillar
n.
The wormlike,often brightly colored,hairy or spiny larva of a butterfly or moth.
毛虫：蝴蝶或蛾子的蠕虫状,多为浅颜色的多毛或带刺的幼虫
Any of various insect larvae similar to those of the butterfly or moth.
毛虫：任何一种类似于蝴蝶或蛾子幼虫的各类昆虫的幼虫