你不必付额外的早餐钱。

You don't have to pay extra for breakfast.

youdao

你每个月在这些额外的东西上花多少钱？

How much do you spend on these extras each month?

youdao

额外的钱谁来出？

Who is going to stump up the extra money?

《牛津词典》

The exact shape of the curve is subject to discussion, but the point of diminishing marginal utility is that, as you get more and more money, the increment in utility for each extra dollar diminishes.

这条曲线的确切形状还有待讨论,但是边际效用递减规律的重点在于,你得到的钱越多,每额外的一美元的增长效用会相对减小

耶鲁公开课 - 金融市场课程节选

So that's what I would do if I had a lot of extra money.

所以如果我有很多额外的钱的话，我就会这样做的。

不需要名牌 - SpeakingMax英语口语达人