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写一篇关于"火"的短文

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写一篇关于"火"的短文
要英文的,50-100个单词左右.
Fire,a form of combustion,is a chemical reaction involving two or more chemicals where the molecules will readily react with each other to form additional chemicals.Linguistically,the word fire refers to the combination of the brilliant glow and large amount of heat released during a rapid,self-sustaining burning of combustible fuel.Fire is not a state of matter:rather,it is an exothermic oxidation process by which heat and light energy are given out.Fire starts when a fuel with adequate supply of oxygen or other oxidizer is subjected to enough heat,and it is sustained by the further release of heat energy in the process,as well as a continuous supply of oxygen and combustible fuel.A match or lighter is usually used to start a fire,which can then propagate to other combustibles because matches and lighters are designed with materials of low burning point.Fire is extinguished when one or more elements of heat,oxidizer,or fuel is removed; this concept is used in the fire triangle.The unburnable solid remains of a fire are termed ash.