The only difference is one of time: Although electric propulsion is very fuel efficient, it is slower due to power limitations.
唯一不同的就是时间：尽管电力推进器是非常高效燃料，它还是取决于能量的限制。
"Electric cars are one of a suite oftechnologies that are making vehicles cleaner and more fuel efficient, " hesaid.
“电动车是使汽车更清洁、燃油效率更高的一整套技术中的一种。” ，他说。
Japanese automakers have enjoyed brisk demand for their smaller, fuel efficient cars in recent years.
日本汽车制造商对近几年来小型汽车和燃料高效汽车旺盛的需求欣喜不已。
So how did they create a gas turbine engine that is fuel efficient yet can go from zero to 62 mph in 3.4 seconds?
那么怎样才能提高燃气轮机的效率，使其能够在3.4秒内将汽车启动并加速到62英里每时？
They reject the limits on engine displacement, instead advocating the promotion of fuel-efficient cars of all shapes and sizes.
他们拒绝在发动机替换上的限制，而提倡促销所有型号的有效利用能源的汽车。
That is why a slightly noisier alternative design by the same researchers that is even more fuel-efficient shows most promise.
所以，同样由研究人员提供的噪音稍大、燃料利用率高的备选方案的前景似乎最光明。
The Italian firm would supply it with “cutting-edge technology” in the form of fuel-efficient engines, small-car platforms and factory automation.
这家意大利的公司将提供“尖端的技术”，如节油发动机，小型汽车生产平台和工厂自动化系统。
U.S. carmakers are rushing to add more fuel-efficient smaller vehicles and hybrids to their fleets in the immediate future.
美国汽车制造商正急于尽快地生产更多的燃料效率的小型车辆和混合动力车型。
As this plan takes effect, GM will start building a larger share of its cars here at home, including fuel-efficient cars.
该计划实施生效后通用汽车公司，通用将在国内汽车市场占有更大份额，其中也包括节能汽车市场。
A secondary benefit is getting gas-guzzling old clunkers off the road and replaced with more fuel-efficient band new models.
一个间接的好处是将大量耗油的老旧汽车从道路上清除，代之以更新型、更有效使用燃料的新汽车。
Only more fuel-efficient vehicles, better public transport, and electric cars will get us off the oil hook.
只有更多的高效能交通工具，更好的公共交通和电力车会让我们摆脱石油麻烦。
Customers could also receive tax rebates for purchasing the more fuel-efficient electric vehicles.
消费者可能还会由于购买这种更节省燃料的汽车而获得减税的优惠。
The first, direct effects, include people who drive more regularly because their fuel-efficient cars are cheaper to run.
第一种，直接回弹效应，这包括由于节油汽车运行成本低，车主更乐意频繁驾驶。
And what if we did this while streamlining transportation services according to fuel-efficient standards?
如果我们按照节能标准来组织安排运输服务，会怎么样？
The two-passenger hybrid aims to be fuel efficient, easy to repair, safe to drive and inexpensive to own.
这辆双座位的混合动力汽车的目标是省油，容易维修，驾驶安全，并且购买价格低廉。
Without Opel, GM's promises to build a fleet of smaller and more fuel-efficient cars in North America would lack conviction.
没有了欧宝，通用汽车要在北美开发一批小型清洁汽车的承诺就变得没有说服力了。
The world’s third-biggest carrier by passenger numbers desperately needs more fuel-efficient planes to overhaul its ageing fleet.
客运量排世界第三的美国航空公司，需要更多的燃油经济型飞机来取代老化的机型。
The compact Volkswagen Beetle has always been a fuel-efficient car, but what about applying that conservationist model to a house?
大众甲虫小型轿车一直以来以省油著称，但如果将其环保主义应用于房屋又会怎样呢？
Another reason is that demand for new, more fuel-efficient aircraft has never been greater.
另一个原因是对于新型，更省油的飞机的需求异常膨胀。
Aviation: Emerging technologies are ushering in more fuel-efficient, comfortable and exotic aircraft. Get ready for the future of flight.
航空业：未来飞机将迎来更高能效、更加舒适、更加奇幻的新兴技术时代，做好准备迎接吧。
The industry has already been developing more fuel-efficient engines and other solutions which are more respectful of the environment.
汽车业已经研发更节能的发动机和其他对环境更有益处的解决方法。
Then Putin, green man of the people, test-drove a new fuel-efficient Lada across a new trans-Siberian road.
然后，人民的绿色活动家普京试驾一辆崭新的节油拉达轿车穿越一条新西伯利亚运输线。
MENTION hybrids these days, and most people think of fuel-efficient cars.
这些天一提到混合体，许多人想到节能车。
Over the long term, they would demand fuel-efficient vehicles.
在长期，它们会需要省油的汽车。
GM is trying to revamp its product line, which has been criticized for lacking fuel efficient vehicles.
通用曾因缺乏节油车型而屡遭诟病，目前正在改进生产线以改变这一局面。
Cuba is gradually augmenting its fleet of thirsty Soviet buses and trucks with new, more fuel-efficient Chinese models.
古巴正逐渐使用新型节能的中国款式来增强本国耗油量大的各类苏式巴士车与卡车。
Cuba is gradually augmenting its fleet of thirsty Soviet buses and trucks with new, more fuel-efficient Chinese models.
古巴正逐渐使用新型节能的中国款式来增强本国耗油量大的各类苏式巴士车与卡车。
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