• 世纪口腔预防医学人类最大贡献之一就是发现氟化物能够预防龋病

    Fluoride could prevent dental caries which is one of the maximum dedication to human beings of oral preventive medicine in 20 Centuries.

    youdao

  • 世纪口腔预防医学人类最大贡献之一就是发现氟化物能够预防龋病

    Fluoride could prevent dental caries which is one of the maximum dedication to human beings of oral preventive medicine in 20 Centuries.

    youdao

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