美国政府为借贷支付了更多利息，而且它已经没有多少容易的办法来控制借贷成本了。
The US government is paying more to borrow, and it is running out of easy ways to rein in its borrowing costs.
路透社
如果美国国债收益率持续上升，华盛顿接下来会怎么做？What will Washington do next if US bond yields keep rising?
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