The central bank posts an interest rate that is the rate at which these member banks can borrow.

中央银行设定一个利率,这个利率是这些会员银行可以借进的利率。

耶鲁公开课 - 金融市场课程节选

A person has a budget constraint if the person can borrow and lend at the interest rate.

在某一利率下,人都有自己的预算限制

耶鲁公开课 - 金融市场课程节选

Each person who wants to borrow has to be met by somebody else who wants to lend, so the interest rate that we have in society is the compromise.

想借钱的人必须找到,愿意放贷的人,因此社会中的利率是各方协调的结果

耶鲁公开课 - 金融市场课程节选

if your friend asked to borrow $100 from you, ... you would probably not say-- you might actually put interest on this person, so you could say, alright, I'll do it with 5% interest, pay me back in a year.

你的朋友向你借100美元，你可能不会说-,你可能会对他收取利息，因此你没准会说，好吧，我要收5%的利息，一年之后连本带利还我。

耶鲁公开课 - 金融市场课程节选