舌下部

例句：

1. 1. She ate a piece of cake with her mouth closed, showing the tongue's lower part.
   她用嘴闭着吃了一口蛋糕，露出了舌头的下部。
2. 2. The doctor examined her tongue's lower part for any signs of injury.
   医生检查了她的舌头下部，看看是否有受伤的迹象。
3. 3. During the meal, she noticed that her tongue's lower part was slightly numb.
   吃饭时，她注意到她的舌头下部有点麻木。