What does it mean that the universe has a galaxy and the world has mountains and seas?

A poem describing the vastness of the natural universe and the magnificence of the world. There is a galaxy in the universe and mountains and seas on earth. This is a poem describing the vastness of the natural universe and the magnificence of the world, expressing the vastness and magnificence of nature. This poem is used to express admiration and admiration for the natural universe and the natural landscape of the earth, emphasizing the vastness and magnificent beauty of the universe and the world.