snow是不可数名词，没有复数形式。snow的意思是雪花，雪，积雪。

举例：

We had snow in May this year.

今年五月我们这儿下了雪。

The snow was like powder. 雪像粉末一样。Snow has prevented communication with the outside world for three days.

大雪使得与外界的通信联系中断了三天。