来自《耶鲁大学开放课程：金融市场第2集第2集》

utility as the function of the amount of money I receive

随着货币的增加边际效用呈
is downwardly-concave.

向下凹进去的曲线
The exact shape of the curve is subject to discussion,

这条曲线的确切形状还有待讨论
but the point of diminishing marginal utility is that,

但是边际效用递减规律的重点在于
as you get more and more money,

你得到的钱越多
the increment in utility for each extra dollar diminishes.

每额外的一美元的增长效用会相对减小
Usually we say it never goes down,

一般我们说它永远不会走低
we don't have it going down, cross that out.

从曲线上来说它不会下降
That would be where having more money makes you less happy.

你可能会觉得你有的钱越多你越不开心
That may actually work that way,

也许实际上会那样
but our theory says no,

但是我们的理论说不不会
you always want more.

你总是希望得到的更多