但是，在那一段时间内，美国的借债成本却是下降的。

And yet during that period, America's borrowing costs have fallen.

youdao

到周三，爱尔兰的预估借债成本已经达到了惊人的水平。

The notional cost of Irish borrowing shot to disturbingly high levels on Wednesday.

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信用评级被下调可能导致更高的利率，从而打击美国疲软的经济，并使得借债成本更加高昂。

A downgrade could lead to higher interest rates, pummeling a weak U.S. economy and making debt servicing even more expensive.

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