到2025年，美国汽车必须符合联邦法律规定的每加仑燃油行驶54.5英里的燃油经济性标准。
American automobiles must meet a federally mandated fuel-efficiency standard of 54.5 miles per gallon by 2025.
现在公司的平均燃料经济性标准是1985年引入的，要求所有的新车的效率是27.5英里每加仑。
Current corporate average fuel economy (CAFE) standards, introduced in 1985, require a fleet average of 27.5mpg from new cars.
汽车工程师们一直都很清楚，设计小排量、重量轻的汽车是满足不断提高的燃油经济性标准最理想的途径。
Engineers have long known that designing smaller, lighter vehicles is an ideal way to meet tighter fuel-economy standards.
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