Before them fire devours, behind them a flame blazes. Before them the land is like the garden of Eden, behind them, a desert waste — nothing escapes them.
牠们前面如火烧灭、后面如火焰烧尽。未到以前、地如伊甸园。过去以后、成了荒凉的旷野。没有一样能躲避牠们的。
In this paper, based on flame propagation a mathematical model of formation and desorption of unburned hydrocarbon in top-land crevice of spark ignition engines has been established.
基于火焰传播过程建立了火花点火发动机顶环岸间隙处未燃碳氢生成和释放过程的数学模型，并利用模型进行了顶环岸间隙处未燃碳氢生成过程的数值模拟计算。
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