每个人都有两套牙齿,第一套牙齿（有20颗）是在你6个月大的时候长的.第二套牙齿（有32颗）是在你6岁到21岁这之间长的.
你每顿饭后都要刷牙,食物的残渣会留在你的牙齿当中造成牙齿的腐烂.你应该上上下下就像扫马路那样把你的牙齿刷干净.如果你吃完饭没有条件刷你的牙齿,那么你就应该漱口或者吃一个苹果,萝卜一类的.
每6个月你应该看一回牙医.如果说你的牙齿上有洞了,牙医会给你补牙.让你的牙齿在两好状态的时间越长越好.
英语翻译Everyone has two sets of teeth.The first set(of twenty)
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