VOA慢速英语2012.09.02 across, 的, 美国, supplies, central

Rebecca949

America is the world’s largest food exporter. But the worst drought in half a century is hitting corn and wheat harvests. The drought across the central United States adds to concerns about world food supplies and prices in the coming years.美国是全球最大的粮食出口国。但半个世纪以来最严重的干旱正在重创玉米和小麦产量。这次横跨美国中部的干旱增加了人们对未来几年世界粮食供应和价格的关注。
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zhant220

experts say by 2050 the world would have to produce 60% more food to feed population roil bigger and richer

liuyuan0830

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jizhao19960124