The flame area which has developed from the fire source is an area of chemical reaction caused by combustion.

火源生成的火焰区是燃烧引起的化学反应区域。

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It causes no spark during construction, fire resistant after drying, and extinguishes in 1s after fire source taken away.

施工时无引火性，干燥后具有阻燃性，离开火源1秒钟自熄。

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Firstly, combined with McCaffreys empirical formulas for plume entrainment, the calculation method of heat release rate of the fire source is discussed;

首先，结合羽流卷吸经验公式，讨论了火源释热速率的计算方法；

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Israeli television said soldiers had failed to locate the source of fire and at first shot back in the wrong direction.

BBC: Israel to step up military operations

"They believed they were coming under attack from that side of the border, " a senior U.S. official said, although investigators have yet to pinpoint the precise source of fire.

WSJ: Airstrike Ravages U.S.-Pakistan Ties

Insurers are thinking twice about covering people who live far from a fire station or a water source.

ECONOMIST: George Bush is not the only one clearing brush