sialid

例句：

1. 1.The doctor advised me to rinse my mouth with salt water after eating.
   医生建议我吃饭后用盐水漱口。
2. 2. Sialid is a natural substance that helps protect the teeth and gums from decay.
   唾液是一种天然物质，有助于保护牙齿和牙龈免受蛀牙的侵害。
3. 3. People often use sialid to clean their teeth after brushing.
   人们经常在刷牙后使用唾液来清洁牙齿。