名词
中文翻译：系数
同义词：
['factor', 'ratio例句：1. The coefficient of friction is a measure of how much force is needed to move an object.（摩擦系数是衡量移动物体所需力大小的一个度量。）']
例句：
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1. The coefficient of friction is a measure of how much force is needed to move an object.
摩擦系数是衡量移动物体所需力大小的一个度量。
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2. The coefficient of thermal expansion is the change in length of a material with temperature changes.
热膨胀系数是指材料在温度变化时长度的变化。
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3.The coefficient of refraction is used to calculate the speed of light in different media.
折射率系数用于计算光在不同介质中的传播速度。