名词
中文翻译：摩擦
同义词：
['contact', 'rubbing', 'frictional force']
例句：
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1.The car's tires have a high friction coefficient, making it difficult to stop.
汽车的轮胎摩擦系数高，很难停下来。
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2.The friction between the two surfaces is what causes the wear and tear.
两个表面之间的摩擦是导致磨损的原因。
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3.The friction between the two pieces of metal is what causes them to slide against each other.
两块金属之间的摩擦使它们相互滑动。