我今年八岁了,到了换牙的年龄,可至今我满口好牙,一颗也没掉。尤其让人想不通的是,我的两颗下门牙没掉落,里面的牙槽上却像雨后春笋一样先冒出了两颗小牙! I am eight years old, to the age of changing teeth, but now I am full of delicious teeth, one did not fall out. Especially unimaginable is that my two lower incisors did not fall, but the inside of the alveolus is the same as the springing up of two small teeth!