牙

例句：

1. 1. She has a set of beautiful pearly whites.
   她拥有一副美丽的珍珠白牙齿。
2. 2. He had to have his wisdom teeth extracted.
   他不得不拔除他的智齿。
3. 3. The dentist advised her to brush her teeth twice a day.
   牙医建议她每天刷牙两次。