American forests are being devastated by foreign pests—and forests full of dead trees are prone to catastrophic fires. A fire in Washington State, above.
美洲的森林被外来害虫毁坏---满是死树的森林容易招致惨重的大火。
Before we could build we had to fire bricks and carry timber from the forests.
在我们建房前我们必须烧制砖块，从森林中采伐木材。
The evergreen forests of the Amazon and Congo basins, for example, are generally fire-free because the closed canopy maintains a level of humidity that inhibits burning.
例如，亚马逊和刚果盆地的乔木通常是防火的，因为它们遮天的树冠保持了一定的湿度，抑制了燃烧。
Before we could build we had to fire bricks and carry timber from the forests.
我们须先烧砖和从林子里运来木材，然后才能修建。
Fire was used initially for warmth, light, and cooking; later it was used in fire drives in hunting and warfare, and for clearing forests of underbrush to facilitate hunting.
火的最早用途是取暖、烹调，后来才用于狩猎和作战，以及为了捕猎而清除下层丛林。
Fire was used initially for warmth, light, and cooking; later it was used in fire drives in hunting and warfare, and for clearing forests of underbrush to facilitate hunting.
火的最早用途是取暖、烹调，后来才用于狩猎和作战，以及为了捕猎而清除下层丛林。
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