When running, the motor drives the spindle and the power wheel to rotate speed.

运转时，电机带动主轴及动力盘高速旋转。

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In another tweak to the recumbent, Stoddard designed the pedals to power the front wheel instead of the rear; however, there is a motor that turns the back tire.

相对于其他卧式自行车，另一项微调是，斯托达德设计的踏板驱动的是前轮，而不是后轮；不过，有一个马达可以转动后轮。

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The motors have all the necessary power and control systems integrated into the wheel hub, greatly reducing the number of connections between the hub motors and the rest of the vehicle.

这些汽车全部具有必须能源，控制与轮毂一体的系统，这样能更大地减少轮毂和汽车其它部分的连接点。

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They can provide power to the wheel motors or help recharge the batteries.

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But GM says the next-generation technology could power rear-wheel-drive cars as well, such as the Cadillac XTS concept car, which was on display at the recent Detroit auto show.

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Controlling steering using electric motors also helps to reduce fuel consumption and hence carbon-dioxide emissions. (Electric motors require power only when the steering wheel is turned, whereas a hydraulic pump drains power from the engine all the time.) Ford reckons 90% of its cars will have electronic steering within three years.

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