The great American railroads were built by and large, for decades, by government subsidies, and a tremendous amount of corruption.

这几十年间,美国伟大铁路建起来了,这当然是是通过政府的支助,以及伴随着数不清的行贿受贿

耶鲁公开课 - 美国内战与重建课程节选

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