This is driving wheel, this is clutch pedal, this is brake pedal, this is accelerator pedal.

这是方向盘、这是离合器脚踏、这是行车制动脚踏、这是加速器脚踏；

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The self-driving car has no steering wheel, accelerator or brake pedal, and its fastest speed is no more than 25 mph (about 40 kilometers per hour).

这辆无人驾驶汽车没有方向盘、油门或是刹车踏板，并且它的最快时速不超过25英里每小时（约40千米每小时）。

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