世卫组织综合预防口腔疾病与健康促进活动。
WHO ACTIVITES FOR INTEGRATED PREVENTION OF ORAL DISEASE AND HEALTH promotion?
生蛀牙不是好消息，而如果涉及到预防口腔疾病，它可就属于这其中比较小的问题了。
DENTAL cavities are not good news, but when it comes to preventive oral health, they may be among the smaller problems.
唾液中含有一些酶，可以帮助我们预防多种口腔疾病。
Saliva contains some enzymes, which help us prevent various oral diseases.
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