名词
中文翻译：等价元素
同义词：
['equivalent element', 'equivalent quantity', 'equivalent quality']
例句：
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1. In economics, the concept of equivalence is crucial for calculating total costs and benefits.
在经济学中，等价的概念对于计算总成本和效益至关重要。
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2. The equivalence element in this equation represents the rate at which the two variables change with respect to each other.
这个方程中的等价元素代表两个变量随着彼此变化的速度。
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3. The researchers found that the equivalence element was responsible for the observed differences in performance between the two groups.
研究人员发现，等价元素是导致两组之间表现差异的原因。