You need food, particularly sweet and sticky food, for the bacteria in your mouth to produce acids that will attack the tooth enamel (outer surface of the tooth).

你需要食物，特别是甜食和粘性食物，你口腔中的细菌就会利用它产酸并损害牙釉质（牙齿表面光亮的那一层）。

youdao

You need food, particularly sweet and sticky food, for the bacteria in your mouth to produce acids that will attack the tooth enamel (outer surface of the tooth).

你需要食物，特别是甜食和粘性食物，你口腔中的细菌就会利用它产酸并损害牙釉质（牙齿表面光亮的那一层）。

youdao