鱼鳞天

　　On October 12, mackerel sky appeared in Zaozhuang city, Shangdong Province. Mackerel sky is a kind of weather phenomenon which forecasts the upcoming cold air in autumn and winter。

　　10月12日，山东枣庄市出现鱼鳞天。鱼鳞天是一种天气现象，经常出现在秋冬季节，预示着冷空气的到来。