Once airborne, the aircraft could save more fuel if air-traffic control systems were reorganised, enabling the pilot to navigate more efficiently and cutting down on delays.
如果空中交通管制系统能够得到改编，使飞行员可以更为有效地驾驶飞机，减少延误，飞机一旦升空就可以节约更多的燃料。
While better fuel-efficiency is good news for Americans' wallets and less driving good for the country's air, for its highways and mass-transit systems, it is something of a disaster.
虽然，更高的燃油效率能节省美国人的经济支出，少驾车也有利于改善美国的空气质量，但这对美国的高速公路和公共交通系统却可以说是一种灾难。
Earlier engine control systems mainly based on mass air flow, fuel quality and Spark Timing.
早期的控制系统主要是以气缸充气量、燃油质量和点火正时为控制参数。
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