[经] 边际效用递减率

diminishing marginal utility的用法和样例：

例句

Digression law of marginal effect is widely used in explaining customers' demands in western economics, which is a basic law of consumer behavior.摘要边际效用递减是现代西方经济学中研究消费者行为时，用来解释需求规律的一种理论观点，也是关于消费者行为的一条基本规律。

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