Speculative borrowers can meet current interest payments from cashflows but need to "roll over" their debt in order to pay back the principal.
投机借款人能够从现金流中支付现行利息，但需要通过延期偿还他们的债务来偿还债务本金。
2
For example, consumer debt service (repayment of principal and interest) is less than 12 percent of disposable income, down from almost 14 percent in 2007, reports the Fed.