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。
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.
降水会打湿地表的易燃物，但也不过是在地下火上结了一层壳而已，地下火仍会继续燃烧好几个月，并可能又冒出地面。
Rain dampens surface fuels, but does little more than create a crust over a ground fire, which can burn beneath the surface for months and pop up later.
堆火的好处在于它既够在平整暴露的岩石地面进行，又可以在象干草落叶一样的有机物轮廓进行。
The advantage of the mound fire is that it can be built on flat exposed rock or on an organic surface such as litter, duff or grass.
应用推荐