不知道从哪天起,我的一颗下门牙松动了,我有点儿紧张地告诉了爸爸。爸爸看了看,笑着说:“不要紧,你要换牙了,吃东西时小心点儿就行了。”这颗牙一天比一天松,我用舌尖轻轻一推,它就倒下去了;我收回舌头,它又站了起来,简直是个“不倒翁”。 I do not know from which day, my lower front teeth loose, I told a little nervously father. Dad looked and smiled and said: “It does not matter, you have to change teeth, be careful when you eat.” “This tooth is loose day by day, and I gently pushed it with my tongue and it fell down ; I retract the tongue, it stood up again, is simply a ”tumbler ".