Clouds in the sky picture material HD wallpaper
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A set of high-definition wallpapers of clouds in the sky pictures are shared with everyone. Clouds, also known as "colorful clouds", are natural phenomena and are the general name of clouds.This natural phenomenon is caused by the rising of moist air. During the rising process, the external air pressure decreases with height, and its volume gradually expands, consuming its own heat during the expansion process.
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