如此各异的经济体，却适用单一利率，会不会造成问题呢？

Would a single interest rate for such different economies cause problems?

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欧盟委员会对于欧元区实行固定汇率和单一利率产生的副作用无能为力—各国都被单一货币粘在了一起。

There is nothing the European Commission can do about the side-effects of a fixed exchange rate and a single interest rate for the euro area—they are inherent to a single currency.

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根据最优货币区域理论，确立一个中央财政政策很有必要，因为单一利率并不适于货币区域内所有地区的情况。

According to the theory of optimal currency areas, a central fiscal policy is necessary because a single interest rate will not suit conditions in all parts of a currency zone.

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