学校的操场边有一个水泥制成的垃圾坑盖子,中间有一个孔。有一次,1岁半的儿子恰巧在上面小便,尿流进小孔中不见了,儿子好奇极了。我趁机教他:“洞洞。”并放了一颗小石头进去,小石头也不见了。儿子更觉得奇怪,他也学我的样,把身边的小石头、小树叶往小洞里塞,嘴里不停地念着:“洞洞……不见了。”我没有制止他,就这样,儿子围着小洞忙乎了约十分钟,弄得满身是泥。 The school playground has a cement junk cover with a hole in the middle. Once, a one and a half year old son happened to pee over, urinate into the hole disappeared, the son was very curious. I took the opportunity to teach him: “hole.” And put a small stone into the small stones disappeared. Son even more strange, he also learned my kind, the small stones around, the small leaves stuffed into the hole, his mouth kept reading: “The hole ... ... gone.” I did not stop him, so , His son around the hole busy for about ten minutes, made covered with mud.