这意味着两点，首先：来自不同融资来源的资金在某种程度上是可互换的：总债务中某项资金出现的赤字可以用原本提供给其他用途的多余资金来填补。
This means two things. First, funds from different sources of finance are interchangeable to a certain degree: deficiency of funds for one component of total debt can be supplemented by surplus funds originally aimed at financing other components.