Floss your teeth at least once a day in order to remove decaying food.
Floss your teeth at least once a day in order to remove decaying food.
每天至少用牙线清洁牙齿一次，以清除残留在牙缝间的腐烂食物。
Floss your teeth at least once a day in order to remove decaying food.
每天至少用牙线清洁牙齿一次，以清除残留在牙缝间的腐烂食物。