A set of desktop wallpapers of high-altitude sea of cloud photography pictures is shared with everyone. Rain comes from clouds.The volume of raindrops is 1 million times the volume of cloud droplets.In other words, it takes 1 million cloud droplets to form one raindrop.In moist air, cloud droplets condense due to cooling.The majestic peaks were swallowed up by the sea of clouds, leaving only the tops of the hills exposed.