You go to a bank and say, I want to borrow to refinance my mortgage, which is due now.

你去跟银行讲,由于现在的处境,我想再申请已到期的抵押贷款

耶鲁公开课 - 金融市场课程节选

But the bank would say, hey you're unemployed; we can't give you a mortgage.

但银行会说,你失业了,所以我们不能给你办贷款

耶鲁公开课 - 金融市场课程节选

so ta retail bank sells the mortgage and then the retail banks flips it to Fannie Mae and Freddie Mac which essentially package huge numbers of the mortgages across the countries.

所以商业零售银行发行贷款，they…,然后商业零售银行将贷款转手,卖给房地美和房利美,事实上是收集了,大量的,全国的房贷。

斯坦福公开课 - 经济学课程节选