上颚的

例句：

1. 1.The dentist is examining the upper jaw forany signs of decay.
   牙医正在检查上颚，看是否有蛀牙的迹象。
2. 2.The patient's upper jaw was severelyinjured during the accident.
   病人的上颚在事故中严重受伤。
3. 3. Thesinger's upper jawwas clenched tightly asshe sang the song.
   歌手唱歌时上颚紧闭。