Explanation: Blue sky: light blue sky. Like the blue of the sky bright and clean washed. Describe the weather was fine. Source: Song Zhang dry "Thinking of You" word: "Miles cloudless blue sky, the moon is very cold dip, curtain jade wave and current." Examples: The time ~, a group of geese geese are ranked from high-altitude flying in the adult word. ★ Shen "fall river (moving in a static)"