holomerodont

例句：

1. 1.The outer layer of the tooth is made up of enamel.
   牙齿的外层由珐琅质组成。
2. 2.The outer layer of the tooth is made up of enamel and dentin.
   牙齿的外层由珐琅质和牙本质组成。
3. 3. The outer layer of the tooth is made up of enamel and dentin, which are also known as the dental enamel and dental dentin.
   牙齿的外层由珐琅质和牙本质组成，也被称为牙釉质和牙本质。