俗话说:“火借风势,风助火威”。在战争史上,借风火攻的例子实在是不少的。但是,这只是提到了风与火的关系的一面——风助火的一面。风与火的关系还有另一面:一旦火灾发生,一定会有风来凑热闹——火能生风。奇怪吗?一点也不奇怪。火灾本身就提供了一个“加热炉”。空气受热膨胀变轻,形成上升气流,火灾中心的气压明显降低,四周的冷空气赶来填补空缺,风于是就产生了——空气流动便成风嘛! As the saying goes: “Fire by the wind, the wind to help fire Viagra.” In the history of war, it is not uncommon to find examples of reckless attacks. However, this only refers to the relationship between wind and fire - the wind side. The relationship between wind and fire there is another side: once the fire occurs, there must be wind to join in the fun - the fire can wind. Strange? Not surprising at all. The fire itself provides a “stove”. The air is heated and expanded to become lighter, forming a rising air flow. The pressure in the center of the fire is obviously reduced. The cold air around us fills the vacancy. The wind then arises - the air flow becomes a thing of the past!