在久晴无风的冬天时,我们工作的效率,常常是很高的。但是一旦天氧突变,刮起很大的西北风来,铅色的浓去布满全天,地上沙尘飞场,温度愈来愈低,往往下降到摄氏十几度之多,有时候还会飘落鹅毛大雪,弄得人们手脚都冻僵了起来,这进候工厂里的发动机不容易开动了,汽车头披上了皮衣以防止水箱的冻裂,田园里幼弱的农作物,也被赶忙的盖上草被,以防止次晨的寒霜侵袭,于是,有气象常识的人便会知道,这是“寒潮”来临了。其实寒潮不但在冬季,即使在春夏秋季,也是会来临的。只不过冬天的寒潮比较其他季节里来得特别猛烈,特别引人注意而已。我国是世界上寒潮最盛行的地区,我国的寒潮 In a sunny, windless winter, the efficiency of our work is often high. However, once the celestial oxygen changes, a large northwesterly wind blows. The thickening of the lead color covers the entire day, and the dust on the ground is flying. The temperature is getting lower and lower, often falling to more than ten degrees Celsius, and sometimes The snow will fall, causing people to freeze their hands and feet. It is not easy to start the engine in the factory. The car’s head is covered with a leather coat to prevent the freezing of the water tank. The young crops in the idyllic garden are also being rushed. The cover was covered with grass to prevent the next morning’s frost from invading, so people with common sense in the weather would know that this was a “cold wave”. In fact, not only in the winter, but also in the spring, summer and autumn, the cold wave will come. However, the winter cold wave is particularly fierce compared to other seasons, and it is particularly noticeable. China is the most popular cold wave in the world, and China’s cold wave