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.

但是过多的氟化物，尤其是对于儿童来说，成年人的牙齿还在形成阶段，当牙齿上形成白色斑块时，就会导致一种叫做氟斑牙的问题。