这种靠偿还抵押贷款支持的债券发布系统在过去的30年中坚持下来，并且很少有过问题。
The system of issuing bonds backed by mortgage payments had endured, with few hiccups, for 30 years. Mortgages were not postal reply coupons.
基本上，美联储通过购买抵押贷款支持债券(和其他银行债)，将资金投入银行体系从而重组银行业的资产。
Essentially the Federal Reserve recapitalized the banking industry by buying its mortgage-backed securities (and other bank debt as well), thus pouring cash into the banking system.
按照官方的说法，美联储是不会直接购买抵押贷款支持债券的：它只不过是将其作为贷款的抵押品而接受下来。
Officially, the Fed won't be buying mortgage-backed securities outright: it's only accepting them as collateral in return for loans.
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