去冬气候为何严寒李声一冬去春来，寒意犹存，刚刚过去的冬季使人们感慨万分。在去年１２月、今年１月，寒冷的强大冷空气先后数次袭击西欧和大半个美国．特别是在今年的春节期间强大的寒冷空气横扫了大半个中国，就连南方的深圳也受到了寒潮的威胁，更有甚者，青海的玉树... Why does the winter weather cold? Li Sheng came to spring in the winter and the chill still existed. The winter just passed caused people to feel great emotions. In December of last year and January of this year, the cold and powerful cold air struck several times in Western Europe and more than half of the United States. Especially during this year’s Spring Festival, the powerful cold air swept across most of China. Even Shenzhen in the south was threatened by the cold wave. What’s more, Yushu in Qinghai Province...