This is the law of diminishing marginal utility.

这就是边际效用递减规律。

The shape of the demand curve reflects the idea of the law of diminishing marginal utility.

需求曲线的形状反映了边际效用递减规律的概念。

So Stan estimates his marginal utility of riding the ride and compares that to the wait.

所以斯坦会估测他玩过山车的边际效用，并与等待时长作比较。

Either way, you'd eventually reach a point where the marginal utility for buying another movie ticket became zero.

不管是选择哪一种，你最终都会到达购买另一张电影票的边际效用为零的那个点。

In the second place the result, namely, the increased stock of gold, does not, as in other cases, have the effect of diminishing its marginal utility.

其次，结果，即黄金存量的增加，并不像在其他情况下那样具有减少其边际效用的效果。

This is because of something called marginal utility, and it means that when you choose between diamonds and water, you compare utility obtained from every additional bottle of water to every additional diamond.

这是因为边际效用。它的意思是，在对钻石和水进行权衡时，你把每多一瓶水得到的效用和每多一颗钻石得到的效用进行比较。

When they have this amount, the marginal utility of the machinery, i.e. the utility of that machinery which it is only just worth their while to employ, is measured by 3 per cent.

当他们有这个数量时，机器的边际效用，即只值得他们使用的那台机器的效用，按 3% 衡量。