The lowest temperature at which vapors rising off the surface of a particular volatile such a crude oil will ignite with a short flash as an open flame is passed over the surface.
短时的一闪，当明焰在表面的上方经过，使得从某挥发性物质(如原油)的表面上升的蒸气着火的最低温度。
In spite of this, when a certain wood reaches flame-flash or ignition, the temperature of the surface does not vary with the change of grain distribution.
尽管如此，木材达到闪火和着火时的表面温度并不随木材内部木纹分布的变化而变化。
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