在汽车中使用玉米乙醇这种生物燃料，将增加对玉米的需求，进而导致人们开垦更多的农田来供给农作物。
Using this biofuel, corn ethanol, in cars will increase the demand for corn which, in turn, will lead to more farmlands created to supply the crops.
农民用水来种植蔬菜、水稻、玉米等农作物，工厂用水来制造产品。
Farmers use water to grow vegetables and crops like rice and corn, factories use water to make products.
从2005年开始，越来越多的美国农民转而种植玉米和大豆等农作物。
Since 2005, a growing number of US farmers have switched to corn and soybeans from other crops.
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