In this system the crankshaft rotating Angle, where the peak combustion pressure occurs, is taken to be a feed back signal, so that the ignition timing of the engine is able to be controlled.

该控制系统利用最高燃烧压力点的曲轴转角作为反馈信号，实现其对发动机点火正时的控制。

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It seems there had been an election, and a signal victory had been won. The city had been swept back into line by a resistless besom of ballots.

似乎有过一次选举，并取得了一次重大的胜利。这个城市被一群不可抗拒的选票重新拉回了原来的路线。

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An intricate set of metal layers focuses and manipulates incoming radio waves, allowing the tag to send back a clear signal.

这套装置以一系列精巧的金属片来聚焦和操控入射的无限电波，使标签将清晰的信号反射回来。

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Today,VOA broadcasts to satellites in space that send the signal back to stations on the ground that transmit programs with a clear signal.

VOA: special.2010.12.08

The device sends a signal to a computer at the back of the car.

VOA: special.2009.11.03

So it's not the journey that's slowing things down, it's the conversion from electronic signal to light and light back to electronic signal.

CNN: Surfing at the speed of light

My technical indicators triggered a sell signal on February 19, almost exactly at that peak, but had me and my subscribers back on a buy signal in mid-August and back into a 20% position in the gold etf GLD.

FORBES: Gold Struggles To Get Its Groove Back

Before she could signal back with a deliberate eye movement, however, Kaye woke up.

FORBES: Saying 'Hi' Through A Dream: How The Internet Could Make Sleeping More Social