小时候我总担心母亲丢了,或者被人冒名顶替。每次母亲出门前我都盯着她牙上的一个小黑点看,看仔细了,要是母亲走丢了,或者谁来冒充她,我就找这个小黑点,找到小黑点就找到了母亲,那小黑点是两颗牙齿之间极小的洞,笑的时候会露出来。母亲每年要去一两次外婆家。外婆家离我家也就四五十公里,但因为跨了省,让我倍觉遥远。母亲出门前我就盯着她牙上 When I was young, I always worried about my mother lost, or was impostor. Every time I go out, my mother stares at a little black spot in her teeth. If I look carefully, if my mother is lost, or who is posing as her, I will find this black spot and find the black spot. Mother, the little black spot is a tiny hole between two teeth, which will be revealed when you laugh. Mother to go once or twice a year grandmother. Grandmother from my home also forty or fifty kilometers, but because across the province, let me feel far away. I stared at her teeth before the mother went out