名词
中文翻译：边际效用递减
同义词：
['declining marginal utility', 'diminishing marginal utility', 'diminishing marginal benefit']
例句：
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1. As the population grows, the marginal utility of food decreases.
随着人口增长，食物的边际效用减少。
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2.The company's profits are declining due to the decreasing marginal utility of its products.
由于产品边际效用的减少，该公司的利润正在下降。
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3. The researcher found that the marginal utility of education is not constant but rather diminishes with age.
研究者发现教育边际效用并非恒定，而是随年龄递减。