每个人需要每天用含氟牙膏。
每天至少用含氟牙膏刷牙两次，每次刷两分钟。
Brush for at least two minutes, twice daily, with a fluoridated toothpaste.
市场中有许许多多的洁齿防垢牙膏，其中绝大多数都含有氟。
There are many tartar control toothpastes on the market, most of which contain fluoride.
大多数牙膏含氟，氟是可以防龋的。
Most toothpastes contain fluoride, which has been proven to prevent cavities.
大多数牙膏含氟，氟是可以防龋的。
Most toothpastes contain fluoride, which has been proven to prevent cavities.
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