There are a variety of ingredients used in toothpaste to help prevent the accumulation of tartar on the teeth.

牙膏配方中加入了很多成分来防止牙垢的累积。

youdao

There are a variety of ingredients used in toothpaste to help prevent the accumulation of tartar on the teeth.

牙膏配方中加入了很多成分来防止牙垢的累积。

youdao