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2013-05-23 12:21
求翻译：There are more than 100 million cars in the United States. A normal car gets less than 15 miles from each gallon of cars. It travels about 10,000 miles each year. In that time, it uses about 650 gallons of gas. In all, autos use up some 70 billion gallons of gas a year. That comes out to be four-and-a-half million barr是什么意思？ 待解决
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There are more than 100 million cars in the United States. A normal car gets less than 15 miles from each gallon of cars. It travels about 10,000 miles each year. In that time, it uses about 650 gallons of gas. In all, autos use up some 70 billion gallons of gas a year. That comes out to be four-and-a-half million barr
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