下雪了,孩子们欢呼雀跃,说要堆雪人,打雪仗。老师看了一下,说:“这雪下不了多长时间,堆不起雪人。”没有多久,雪果然停了。孩子们很奇怪,问:“老师,你怎么如道这雪下不长呢?”老师说:“刚才下的雪,个儿小,形状大多相同,说明天上云层较薄,不会有很多的雪下来。天上飘下来的雪,它的结晶大部是六角形,外形看看差不多,但 Snow, the children cheered, said to make snowmen, snowball fight. The teacher looked and said: “This snow does not last long, heap can not afford a snowman.” Not long after, snow really stopped. Children are very strange and asked: “Teacher, how do you know this snow does not last long?” The teacher said: "The snow just under, a small, mostly the same shape, that the sky is thin, there will not be a lot of snow Down the snow floating in the sky, most of its crystallization is hexagonal shape look almost, but