这笔额外的钱正好派上了用场。

The extra money came in very handy.

《牛津词典》

额外的钱谁来出？

Who is going to stump up the extra money?

《牛津词典》

他想在退休后有个收入来源，而这之前则不需要额外的钱。

He wanted to have a source of income after his retirement; until then, he wouldn't require additional money.

《柯林斯英汉双解大词典》

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