a fall of snow的用法和样例：
- The ground was salted with a fall of snow.
- A fall of snow freshened the air.
- The hills were salted with a light fall of snow.
- A heavy fall of snow lay on the street.
- A heavy fall of snow covered the ground.
- This might be caused by an earthquake or it might happen after a heavy rain or when soil becomes waterlogged after a fall of snow.