The stones are designed to generate as much frictional resistance as possible - like sand scattered on an icy pavement - and so reduce the speed of a skidding car quickly and effectively.
The stones are designed to generate as much frictional resistance as possible - like sand scattered on an icy pavement - and so reduce the speed of a skidding car quickly and effectively.
砂石用以产生尽可能多的摩擦阻力-类似于砂石被撒在一条被冰覆盖的路面上-如此一来就有效地缓解了一辆打滑赛车的速度。