然而安装一个齿轮减速器后，涡轮可以高速驱动低速运转的风扇。

A gearbox, however, allows the turbine to operate at a high speed while driving the fan at a lower speed.

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入伍后，学友管白莉叫“小齿轮”，她连油门踏板都够不着。不过，借助一小叠枕头，她竟也能成为最佳的特技飞行员之一。

Called "Little Gear" by her classmates, Bayley had trouble reaching the pedals but nonetheless became one of the best acrobatic pilots in the program with the aid of a small stack of pillows.

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通过对齿轮接触印痕图像进行多种方法处理后结果的比较，总结出了较好的处理方法和步骤。

The paper sums up the better method and process by contrasting to results from several process methods to contact trace of gears.

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