以下为句子列表：
英文: Input rotation by handle, with the variation in cam radius, due to that the roller is level with the input contact point, the output is a reciprocating motion of the roller.
中文: 利用把手输入一端转速，藉由半径的变化，因输出端滚轮的高度需与输入端接触点相同，而造成输出端的高度有往复式的高低变化。
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英文: The crankshaft, in conjunction with the connecting rod, converts the reciprocating motion of the piston to the rotary motion needed to drive the vehicle.
中文: 曲轴，和连杆一起，把活塞的往复运动转化为驾驶车辆需要的旋转运动。
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