This is the present value of $1 in one time period, which I'm taking to be a year.

这就是一美元在一段时期内的现值,我只是将一美元持有一年

耶鲁公开课 - 金融市场课程节选

The present value is equal to-- remember it starts one year from now under assumption-- we could do it differently but I'm assuming one year now.

则现值就等于,记住它从现在开始起一年一年的支付,只是个假设,我们能做不同的假设,但现在我就假设成一年

耶鲁公开课 - 金融市场课程节选

Let's say it's one year and I'm going to actually plot on this axis a person's income this year.

我们假设是一年,我用x轴表示,一个人今年的收入

耶鲁公开课 - 金融市场课程节选