名词
中文翻译：频率系数
同义词：
['frequency coefficient', 'frequency factor']
例句：
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1.The coefficient of friction between the two materials is very low.
两种材料的摩擦系数非常低。
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2. The coefficient of thermal expansion for this material is known to be high.
这种材料的热膨胀系数已知很高。
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3. The coefficient of variation is a measure of the amount of variation in a dataset.
变异系数是衡量数据集中变化量的指标。