全新的动力装置以齿轮传动结构为特点，此结构允许前端风扇转速比中心部分慢3倍，优化了发动机各部分的速度。
The all-new powerplant features a geared architecture allowing the front fan to spin three times slower than the core, thus optimising the speed of each section of the engine.
由于DAC和齿轮减速比都影响着伺服系统的开环增益，当系统开环增益一定时，DAC位数的实际作用和减速比的选择相互限制，在设计雷达伺服系统中需注意。
When the open-loop gain of servo system is determined, the selection of DAC resolution and gear ratio is restricted each other and should be paid much attention in the design of servo system.
作为摩托车初级传动的曲轴齿轮及初级从动齿轮，由于转速高及降速比大，是产生噪声的主要因素。
The primary drive gear(crankshaft gear)and the primary driven gear are the source of noise due to their high speed and bigger reduction ratio.
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