美国的主要债务担保方案在下月新发布之时就告结(一些已发布的担保将在2012年告结)。
America's main debt-guarantee scheme will close to new issuance next month (with those guarantees already issued expiring in 2012).
它正背负大量债务，主要是由于在2004年的大量购入，并且大多是短期的。
It was carrying lots of debt, principally because of a big acquisition in 2004, and much of it was short-term.
另外一个债务的主要构成部分则由社保账户上的盈余构成。
Another substantial portion of the debt consists of surpluses in the social security account.
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