一些汽车和卡车司机紧随大型卡车之后行驶，利用空气动力学作用减少自身的燃油消耗，但是这种做法是相当危险的。
Some car and lorry drivers try to exploit this aerodynamic effect by tailgating big trucks to reduce their own fuel consumption. But it is exceedingly dangerous.
发动机效率很高，丹麦首席工程师指出，船每平均行驶17节，每海里每吨货物只消耗3克燃料-这听起来肯定算很低了。
Yet so efficient is the engine, says the Danish chief engineer, that cruising at an average of 17 knots the ship consumes just 3 grams of fuel per tonne per nautical mile-which certainly sounds low.
在市内每行驶一英里，那些使劲踩着油门开车的人会消耗多达37%的汽油。
People who are heavy on the pedal use up to 37% more gas during every mile of city driving.
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