上齿比下齿窄的

例句：

1. 1.The man's teeth were so narrow that he could barely fit them together.
   这个男人的牙齿太窄了，他几乎无法将它们合在一起。
2. 2. She had a mouth full of sharp, pointed teeth.
   她嘴里有一排尖锐、尖利的牙齿。
3. 3.The dentist told him to have his teeth cleaned regularly to prevent decay.
   牙医告诉他要定期洗牙以防止蛀牙。