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 齜牙咧嘴 When I mentioned her name , his wide smile stiffened into a rictus. 儅我提起她的名字時，他的微笑變得僵硬起來，成了齜牙咧嘴。 返回 rictus