n. freshwater or marine or terrestrial gastropod mollusk usually having an external enclosing spiral shellv. gather snails
n. 蜗牛, 行动迟缓的人, 脑筋迟钝的人, 蜗形凸轮vt. (蜗牛般)缓慢地打发(时间)vi. 缓慢移动