That's sometimes called " packing" or " packing material."

这有时被称为“包装” 或“包装材料” 。

We have what we call, " packing snow" which is snow that comes down when the temperature is close to zero, and you're able to pack the snow together and build things like snowmen.

我们有所谓的“堆积雪” ，当温度接近于零时， 雪就会降下来，你可以把雪堆积在一起， 堆出像雪人这样的东西。