What does the blue ocean mean?

Hailan's explanation is that the sea is as blue. Liu's From Fulaerji to Qiqihar: "I don't know if it is a lark or a lark. It was flying in the sky, but when I looked up, I saw a sea blue, and there was not even a bird. " People's Daily 1958. 1 1.8: "Young navy soldiers, wearing navy uniforms, with white lapels." The sea is close to the mainland and smaller than the ocean: the ocean. Sea level. Haijiang. Inland coast. Oath of eternal love is used for the name of the lake: Qinghai. Zhongnanhai. A huge ship: the sea bowl. Han Hai (honorific, calling the other person generous and tolerant). Haikou is overheated. Blue) × indigo dyed color, the color of clear sky: blue. Blue. Blueprint. Blueprint. There are many kinds of plant names, such as Polygonum cuspidatum, Isatis indigotica, Indigofera indigotica and Malan. Ancient times were the same "rags" and rags. Last name. Number of strokes:; Radical: meter; Bishunbian