For example, I may have someone who promises to pay me $1 in one year or in two years or three years.

举个例子,有人对我承诺,在一年或者两年或者三年内支付我一美元

耶鲁公开课 - 金融市场课程节选

I may have an "IOU" From someone or I may own a bond from someone that promises to pay me something in a year or two years.

也许我握有一份欠条,或是一份合约,某人承诺,在一年或者两年内支付我一些钱

耶鲁公开课 - 金融市场课程节选