我们最好每天刷牙两次。
我每天刷牙两次。
每天刷牙两次已足够了(早起和临睡前)。很多人刷牙次数超过了推荐次数——尤其是在吃过大餐后。
Brushing your teeth twice a day (in the mornings and last thing at night) is sufficient. Many people brush more than the recommended number of times per day - especially after a big meal.
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