Traditional Culture Encyclopedia - Weather inquiry - What does this have to do with hail and frost?

What does this have to do with hail and frost?

Lightning is one kind, raindrops and hail are one kind, showers and frost are one kind. Lightning is a kind of loud noise and electric fire produced by cloud discharge with positive and negative charges. Raindrops and hail are different forms of water, raindrops are liquid water, hail is solid water, and the essence is one kind, while showers and frost are weather phenomena, not rain and frost, so they are one kind.