名词
中文翻译：互惠定理
同义词：
['reciprocity theorem', 'mutual theorem']
例句：
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1.The reciprocal theorem states that the product of two numbers is equal to the sum of their reciprocals.
互惠定理表明两个数的乘积等于它们的倒数之和。
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2. In economics, the reciprocal theorem suggests that the marginal utility of a good is inversely proportional to its price.
在经济学中，互惠定理表明一种商品边际效用与其价格成反比。
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3. The reciprocal theorem has been used to explain the relationship between supply and demand in many markets.
互惠定理已被用来解释许多市场中供给与需求之间的关系。