美联储同样认为，保持长期汇率不变地承诺是有条件的，并不是像许多人认为的那样，一定要是6个月，而是以高失业率和低通货膨胀率(两者皆实际存在且已被预期)为前提的，如果有前提改变的话，利率自然也会跟着改变。

It does not mean six months, as many seem to think, but only as long as unemployment remains high and inflation (both actual and expected) stays low. If those things change, so will interest rates.

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