What this equation merely says is that the present value of your remaining payments is always equal to the mortgage balance.

这个等式说明了,剩余偿还额的现值,就等于抵押贷款的余额

耶鲁公开课 - 金融市场课程节选

But the law--the SEC requires that they at least present the standard earnings definitions for all these things Now another--let me just mention off balance sheet accounting.

不过,证交会规定他们至少要披露,各项收益标准定义,另一个内容,表外业务会计核算

耶鲁公开课 - 金融市场课程节选