Abstract: This text discusses relevantly about the question of decayed tooth mainly. And whether how protect tooth, keep oral hygiene notice which respect go on and investigate and study.
英
美
释义
本文主要对蛀牙问题进行相关讨论。并且对如何保护牙齿,维持口腔卫生应注意哪些方面进行了调查与研究。
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