边际效用递减率

marginal utility───[经]边际效用

diminished responsibility───递减责任；[法]减轻责任

diminishing importance───重要性递减

diminishing returns───收益递减；报酬递减

Consequently ecosystem value has rigid trait which is different from the law of diminishing marginal utility.───因此，生态价值不完全具备边际效用递减的规律，而存在刚性。

The above utility function also has the property of diminishing marginal utility for each commodity.───上面的效用函数也有每种商品边际效用递减的性质。

The principle of diminishing marginal utility is no less applicable to money than to other commodities.───同样是“边际效用递减规律”,为什么对“货币”会有所不同?

Diminishing marginal utility also expresses a " variety is the spice of life ".───边际效用递减也表现为一种 “ 多样化是生活乐趣 ”.

I think you've gotten from other economics courses — we have something called diminishing marginal utility.───我认为你们已经从其它的经济学课程中学过了，称为边际收益递减。