It means: the movement of the sun and the moon, the brightness of the galaxy seems to come from the sea. This sentence describes the all-encompassing breadth of the sea. This sentence not only describes the scenery, but also refers to the author's own ambition to unify the four seas! So it should be this sentence. "Fortunately! The song is based on ambition. " This sentence has no practical significance, it is used to reconcile poetry!