珐琅质，形成保护膜，使您的牙齿更坚固，健康。

Enamel, the formation of protective film, to make your teeth more strong, healthy.

youdao

珐琅质，形成保护膜，使您的牙齿更坚固，健康。

Enamel, the formation of protective film, to make your teeth more strong, healthy.

youdao