it will help you to prevent tooth decay and gum diseases.
这样可以帮住你防止蛀牙和防止齿龈炎发生疾病。
lactic acid can be used as an active ingredient in toothpaste and other oral hygiene products to prevent tooth decay and freshen breath.
乳酸可用作牙膏和其它口腔卫生品的活性物以防龋齿及保持口腔清洁。
if you’re following your dentist’s orders, you floss every day to prevent tooth decay and gum disease.
按照牙医的建议,你每天剔牙可以防止蛀牙和预防牙周炎。