牙」-相关词汇：teething 婴儿长牙；baby teeth 乳牙；permanent teeth 恒牙；门牙front teeth；智齿wisdom teeth；喜欢吃甜的可以说 I have a sweet tooth. 虫牙cavity；假牙 fake teeth, denture; 牙齿不齐是 crooked. 牙套是 braces. 保持器是 retainer; 天包地是 overbite; 地包天是 underbite
