You wished for your child to have all permanent teeth.
你多希望孩子的牙都换成了恒牙。
By 7 months: All permanent teeth are in and are white and clean.
7个月，恒牙都长了，又白又齐。
By the time a child reaches age 21 years all 32 permanent teeth will usually have erupted.
当孩子到达年龄21年的时候全部32个恒牙通常恒牙萌发完成。
By the time a child reaches age 21 years all 32 permanent teeth will usually have erupted.
当孩子到达年龄21年的时候全部32个恒牙通常恒牙萌发完成。
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