各成员国货币统一为欧元时是经过详细计划的，汇率是同所有成员国合作提前固定的。

The changeover to the euro was planned in detail and the exchange rate was fixed in advance, in co-operation with all the euro members.

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一个世纪以来最为严重的这场经济危机使欧盟仅仅货币统一，财政经济不统一的缺点暴露无遗。

The deepest financial crisis in a century has exposed the fragility of a monetary union without a fiscal and economic union.

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欧洲开始了通过一项汇率机制迈向货币统一的漫长过程，30年后，它们拥有了一种自由浮动的单一货币。

Europe started a long process towards monetary union, via an exchange-rate mechanism, which resulted in a single and free floating currency 30 years later.

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The currency is centralized at the European Central Bank.

货币在欧洲中央银行,被统一了。

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