power train

n. 动力系

例句与用法：

Any of various hand or power tools with fixed or adjustable jaws for gripping, turning, or twisting objects such as nuts, bolts, or pipes.

扳手一种有固定或可调整的钳口的手用或机械工具，用来咬合、转动或扭转如镙钉、镙铨或管子的物体

power train

power train1.■(运载工具中的)动力传动系(可包括驱动轴、离合器、变速器和差速器)

1. the mechanism that transmits the drive from the engine of a vehicle to its axle
   （运载工具）动力系
   ■this mechanism, the engine, and the axle considered collectively
   动力系［总称］
   

power train

名词 power train:

wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed

同义词：gearing, gear, geartrain, train

power train