切记牙齿的内侧和咬合面都要刷到，舌苔也要刷哦。

Remember to brush the inside and chewing surfaces of your teeth, as well as your tongue.

youdao

切记牙齿的内侧和咬合面都要刷到，舌苔也要刷哦。

Remember to brush the inside and chewing surfaces of your teeth, as well as your tongue.

youdao