1. At the same time, the government predicted that soybean production would be twelve percent lower than last year.

at the same time 与此同时
例句：At the same time, steam was building up within the volcano. 
与此同时，在火山中形成了水蒸汽。 

2. The production process leaves some of that in a form that can be fed to animals. Still, at least one-fourth of the American corn crop is now made into fuel.

at least 至少
例句：At least, I sincerely hope so. 
至少我是真诚地这样希望的。 

3. Ethanol is good for America."

be good for 有益于;适于
例句：A bowl of hot chicken soup is good for you. 
喝一碗热鸡汤对你有好处。 

4. This year, about fifty billion liters of ethanol will be added to gasoline.

add to 增添，增加
例句：I have nothing to add to my earlier statement. 
我对我先前说的话, 没有什麽补充的. 
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