齿毛

例句：

1. 1. The dog has a lot of fur, but not much hair on its teeth.
   这只狗有很多毛，但牙齿上几乎没有毛。
2. 2. The cat's whiskers are very long and covered with tiny hairs.
   猫的胡须很长，上面覆盖着细小的毛发。
3. 3. The man had a small patch of hair on his chin, which he kept trimmed.
   这个男人下巴上有一小撮头发，他经常修剪。