But 46 states are obligated to balance their budgets each year.

但46个州都有责任平衡每年预算。

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Lehman exploited a loophole in accounting rules to sell assets, getting them off its balance sheet even as it was obligated to repurchase them a short while later.

雷曼利用了一个会计规则漏洞，出售资产，并把这些资产从自身资产负债表中移除，尽管在不久后雷曼有义务回购这些资产。

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Now bankers are scrambling to limit how much money they will have to lend through these pre-existing credit lines, which they are obligated to do, just as their own balance sheets are stressed by limited ability to borrow from fellow banks.

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