Snow comes from clouds, and it is made of snowflakes. 雪从云里来，它是由雪片形成的。

　　As snowflakes grow bigger and heavier in the cloud, they fall toward the ground. 当云中的雪片变得更大、更重时，它们就会落向地面。

　　All snowflakes are six-sided ice crystals. 所有的雪片都是六边的冰晶。

　　They all look different. 但它们形状各异。

　　In order for children to have snowball fights, the air temperature has to be not too cold. 为了能让孩子们打雪仗，空气的温度不能太低。

　　If the air is too cold, the snow will not stick together very well. 要是太低的话，雪就不能很好地粘在一起。