智齿都是发育不全的牙,是最后面的。我才发现,我只有2 颗智齿,右上和左下,右上有8 颗牙,左下有8 颗牙。
智齿都是发育不全的牙,是最后面的。我才发现,我只有2 颗智齿,右上和左下,右上有8 颗牙,左下有8 颗牙。
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