名词
中文翻译：互惠的
同义词：
['mutual', 'reciprocal', 'reciprocal exchange']
例句：
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1.The two countries have established a reciprocal trade agreement.
这两个国家已经建立了一个互惠贸易协议。
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2.The reciprocal of a number is the sum of its positive and negative reciprocals.
一个数的倒数是其正负倒数之和。
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3.The reciprocal of a fraction is the quotient of the numerator and denominator.
分数的倒数是分子与分母的商。