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雾，是自然界的一种常见天气现象，它是由地表蒸发出来的水分子受冷空气影响凝聚而成的小水滴或冰晶汇集而成，飘浮于低空。冬季气温低，雾容易形成，尤其是清晨，有时会大雾弥漫。雾的危害很大，它除了能引起行人意外受伤、汽车相撞、列车脱轨、班机延误、通讯线路中断等事故?
Fog is a kind of common weather phenomenon in nature. It is a water droplet or ice crystal that water molecules evaporating from the surface condenses by the cold air and floats at low altitude. Low temperatures in winter, fog easily formed, especially in the early morning, sometimes filled with fog. Fog great harm, in addition to it can cause pedestrian accidental injuries, car collisions, train derailment, flight delays, communications lines and other disruptions?