They provide friction, so the vehicle can grip the road, but some of the power supplied to the tyres is lost as heat.
汽车的抓地力正是因为轮胎的摩擦力提供的。但供给轮胎的能量一部分要消耗在生成的热量。
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The rebel opposition to Libya's Colonel Muammar Qaddafi tightened its grip on Tripoli, the capital, as his wife, his daughter and two of his sons fled by road to neighbouring Algeria.
A "durable security compound" incorporated into the treads of the company's new Energy Saver tyre helps maintain the tyre's rigidity, allowing it to grip the road.