fire extinguishingˈfaiəiksˈtiŋɡwiʃiŋ短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 灭火 Because its combustion rate has an important effect on the fire extinguishing efficiency, this paper mainly discusses the means of improving the combustion rate on the basis of theoretical analysis. 因为其燃烧速度对灭火效率有重大影响，故本文在理论分析的基础上，采用加入金属粉提高导热系数，增加反应放热量； cnki