口齿

例句：

1. 1.She had a bad toothache and couldn't eat anything.
   她牙痛得厉害，什么都不能吃。
2. 2. He ate hisfood with his mouth closed, avoiding theneed for chewing.
   他吃东西时嘴巴紧闭，避免需要咀嚼。
3. 3. Thedentist advised her to floss regularly to keep her gums healthy.
   牙医建议她定期刷牙来保持牙龈健康。