n.摩托车越野赛
Discover the world of super bikes, from stunt riders to road safety, Grand Prix racing to motocross and speedway. 从摩托车特技表演到公路上的安全驾驶，从国际摩托车大奖赛到摩托车越野赛，作者将带你走进超级摩托车的精彩世界。
