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Blacks not only can produce dentifrice but also can be a president .

黑人不单只能制造牙膏,而且能当总统.

Toothpaste , also known as dentifrice , is available in paste , gel , or powder form .

牙膏，或者说洁齿剂，生活中可用到的通常是膏状，胶状，或者是粉状。

The prevalence of dental fluorosis of the children drinking low fluorine water , no matter whether using fluoride dentifrice or not , was no difference .

饮用低氟水的儿童无论是否使用含氟牙膏，其氟斑牙发病率间没有差别。

Methods based on the fluorine concentration of drinking water , the children ( 10-14 years ) were divided into high fluorine group and low fluorine group , and then using fluoride dentifrice group and no-using fluoride dentifrice group , then to check up every status of dental fluorosis and dental caries .

方法根据饮用水的氟含量选择10到14岁儿童分为高氟饮水组和低氟饮水组，再分成使用含氟牙膏组和不使用含氟牙膏组，分别检查氟斑牙和龋齿情况。