In the United States was first launched in Nebraska 19 centuries ago, Nebraska was a bare wasteland, trees scarce, land dry winds together, yellow, the people's suffering bitterly from sky.
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As trees became scarce and they could no longer construct wooden canoes for fishing, they ate birds.
由于树木变得稀少，他们不能再建造木制的独木舟来捕鱼，只好捕食鸟类。
Trees, he says, are also a source of natural medicines, no small advantage in an area where modern health care is scarce and expensive.
他认为树木也是天然的药物来源。在健康护理资源稀少并且昂贵的地区，这的确有着不小的作用。
The fungus attacks the roots of the trees, choking off a water supply that has been made scarce by successive years of drought.
疫霉菌攻击树木的根，更在连年干旱的情况下切断了它们供水。
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