fluoram

例句：

1. 1. The chemical compound of fluorine and oxygen is known as fluoride.
   氟和氧的化学化合物被称为氟化物。
2. 2.The water in the lake is rich in fluoride, which can be harmful to humans.
   湖中的水富含氟，对人类有害。
3. 3. The fluoride in toothpaste helps to strengthen enamel and prevent cavities.
   牙膏中的氟有助于强化珐琅质并预防龋齿。