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It is polluting millions of acres of cropland.
出自-2016年6月阅读原文
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Facing water shortages and escalating fertilizer costs, farmers in developing countries are using raw sewage ( ' , 下 水道污水) to irrigate and fertilize nearly 49 million acres of cropland, according to a new report—and it may not be a bad thing.
出自-2016年6月阅读原文
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One acre of farmland use to for raising cows can produce 250 pounds of beef.
出自-2013年6月听力原文
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One acre of farmland use to for crop production can produce 1,500 pounds of tomatoes
出自-2013年6月听力原文
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The national average farm size is around 440 acres, but his is only one acre.
2019年12月六级真题(第二套)听力 Section B