另一半儿童在一天中用氟化物牙膏普通刷牙两次并且吃单纯的无糖薄荷糖。
The other half brushed normally twice daily with fluoride toothpaste and took plain sugarless mints.
选牙膏的时候要确保它含有氟化物。
When you're choosing a kind of toothpaste, make sure it has fluoride.
当我们认识到氟化物可以大显身手是，我们开始在饮用水、牙膏和漱口水里加氟。
When we realized that fluoride could help, we put it in our drinking water, our toothpaste and our mouthwash.
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