This CDC recommendation is solely based on an amount that balances the protection from tooth decay while limiting the risk of dental fluorosis.

CDC 这一建议完全基防蛀和限制齿氟斑病风险之间取得平衡剂量。

But too much fluoride, especially for children who's adult teeth are still forming can lead to a problem called dental fluorosis when white patches form on teeth.

但是过多氟化物，尤其是对儿童来说，成年齿还形成阶段，当齿上形成白色斑块时，就会导致一种叫做氟斑问题。