In the meantime, situations may arise in which the interest rate is the only instrument available for limiting financial excesses. And, as the recent crisis demonstrated, there are circumstances when central bankers should use it.
与此同时，可能出现某些状况，此时利率是唯一可用的限制金融过度的工具。最近的危机表明，在一些环境下，央行行长应该使用利率工具。有时，不作为（放任金融危机发展）的成本实在太高。