阿兰·普里奥是法国一名惊险特技表演者。他驾驶着时速为一百一十公里的摩托车在两秒钟之内飞穿过固定在一辆仅用一个轮子着地而且急速行驶着的小汽车顶上的火圈。这不仅要有胆量,还要有良好的数学知识。因为,当他驾驶摩托车钻火圈时,必须要在小汽车与摩托车的运行轨道相交的一瞬间才行。由于阿 Alain Proly is a thrilling stuntman in France. He drove a motorcycle that was traveling for 110 kilometers a second in two seconds through a ring of fire fixed to the top of a rapidly moving car that landed with only one wheel. This not only has courage, but also has a good mathematical knowledge. Because when he drives a motorcycle to drill a ring of fire, it must be the car and the motorcycle’s orbit the intersection of the moment. As Ah