The United States is one of twenty-five countries where farmers planted genetically engineered crops in two thousand nine.

VOA: special.2010.04.27

That meant that people growing corn were less-- less vulnerable to having things wipe out entire crops because there were different types of crops planted around the world, so the world corn supply would never be threatened by anything.

也就是说只要人们种植玉米,整个粮食体系就不可能那么轻易被摧毁,由于世界各地种植着不同品种的玉米,世界玉米供应不会受到任何影响

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But the amount of cropland planted with the crops rose by an estimated seven percent worldwide.

VOA: special.2010.04.27

Farmers planted more of their best crops, or "cash crops." for export.

VOA: special.2010.03.30

American farmers first planted genetically engineered crops in nineteen ninety-six.

VOA: special.2010.04.27

They planted fewer food crops for local use.

VOA: special.2010.03.30

Nearly half of the farmland in the United States is planted with crops that have been genetically engineered, mainly maize,soybeans and cotton.

VOA: standard.2010.04.15