剑桥词典an expression in which someone shows their teeth in a smile , but looks strange or in pain rather than looking happy and relaxed 龇牙咧嘴 When I mentioned her name , his wide smile stiffened into a rictus. 当我提起她的名字时，他的微笑变得僵硬起来，成了龇牙咧嘴。 返回 rictus