动词
中文翻译：摩擦
同义词：
['rub', 'rubbing', 'friction', 'rubbing against']
例句：
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1. The car's tires are getting worn out from the constant frictioning.
汽车的轮胎因为不断的摩擦而磨损。
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2. The two pieces of metal were rubbing against each other when they came into contact.
当这两个金属片接触时，它们相互摩擦。
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3. The friction between the two surfaces caused a small amount of heat to be generated.
两个表面之间的摩擦产生了少量的热量。