Paul can't drive so he was a fat lot of use when I broke my arm.
保罗不会开车，所以我手臂骨折时他一点忙也没帮上。
《牛津词典》
2
For example, it could allow a driver to view a GPS map on their arm while they drive around.
例如，它可以让司机在开车时查看手臂上的 GPS 地图。
3
Again, the size is of your pinky finger nail, all within the skin so you can just turn out your information to drive, for example a replaced arm or a computer screen.