The final step came when steam was introduced into the cylinder to drive the piston backward as well as forward, thereby increasing the speed of the engine and cutting its fuel consumption.

最后一步是将蒸汽引入气缸，使得活塞前后推动，从而提高了发动机的速度，降低了燃料消耗。

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They work with remote control devices that change the direction, position and speed of a German-made cutting machine that slices back and forth along a 300-metre-wide coal face.

他们操作的遥控装置可以改变截煤机的方向、位置和速度，这台德国产的截煤机可以沿着一道300米宽的煤面来回进行切割。

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Passengers will ultimately be able to speed from the Italian city of Milan to Zurich in less than three hours and further north into Germany, cutting the journey time by an hour.

旅客们最终将可能把从意大利城市米兰到苏黎世的旅程缩短到三小时以内，而且能进一步北上德国，将路程时间缩短整整一个小时。

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So the choice is not really between austerity and growth, but over the timing and speed of deficit-cutting and the right mix of structural reforms.

ECONOMIST: Charlemagne

But today, file-sharing is one of the most cutting-edge areas of software development, as high-speed Internet connections allow users to trade music, movies and applications at a blistering pace.

FORBES: LimeWire, BitTorrent and BearShare...Oh My!

But Android vendors are going to press hard the argument that they represent the cutting edge of both mobile data download speed and processor performance.

FORBES: Nvidia's Phone Strength May Be Underestimated