So, even if the cost is small, $10 a dose, it quickly amounts to a large amount of money.

因此,即使单只成本很小,可能只有十美元,但是这很快就会累积成为很大的金额

耶鲁公开课 - 生物医学工程探索课程节选

If I buy this amount of two-period bonds, how much does it cost me?

如果我买这么多两年期债券,我要花多少钱呢

耶鲁公开课 - 金融市场课程节选

Often, vaccines cost a considerable amount to produce.

通常,疫苗的生产成本是很大的

耶鲁公开课 - 生物医学工程探索课程节选