The effects of moisture vaporization and organic matter pyrolysis on crown fire spreading are discussed, and the characteristic curves are obtained by numerical calculation.

通过数值分析，得到树冠火蔓延速度特性曲线，研究水份蒸发和有机物热解对树冠火蔓延速度的影响。

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The wind, or fire meet tree-trunk enwinds climbing plants and have lowered down the branches of the tree and fire up to become crown fire.

当地面火遇到大风时，或树干上缠绕着爬蔓植物和有低垂下来的树枝，火便上升到树冠，成为树冠火。

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The Parks Service is adding another staircase in part to make it easier for visitors who climb the statue's stairs to the crown to exit quickly in case of a fire or other emergency.

公园服务部正增添新的楼梯系统，以便于通过楼梯到达顶部的游客在火灾等紧急情况下能更快地逃生。

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Mrs Philpott told Nottingham Crown Court she did not plan or set the fire in Derby and did not see her husband or co-accused Paul Mosley start it.

BBC: Derby fire deaths: Mairead Philpott 'abused by her father'