And London's Transport Authority has promoted the Oyster card, a magnetic payment system that keeps track of where people have been and when.

VOA: standard.2010.04.01

When the date came, you would cut the coupon off and go to the bank and get your interest payment.

到息日到了以后，你就可以剪下这张息票拿到银行,去兑换利息。

耶鲁公开课 - 金融市场课程节选

When you first bought the house they told you what the mortgage payment was and they're fixing that forever, well for thirty years.

最初你买这套房子的时候,他们已经告诉你每月偿还额是多少,在未来30年里这是固定的

耶鲁公开课 - 金融市场课程节选

The mortgage payment was decided when you took out the mortgage, so that never changes; they than figure out what your mortgage balance is.

每月偿还额是一开始确定的,因此不变,这样就能算出当前的贷款余额

耶鲁公开课 - 金融市场课程节选