Clearly, the need for much greater eurozone integration must be balanced against some countries’ strong desire to preserve more national sovereignty than is feasible in the monetary union. The best way to do this would be to divide Europe into two groups.
显然，一边是推进欧元区一体化的需要，另一边是一些国家强烈希望保留比可预见的货币联盟更多国家主权，这两方面需要平衡。实现平衡的最佳办法是将欧洲分割成两个集团。个体国家被划入那个集团不是基于一体化的潜在“速度”，而是该国是否决定永久（或至少长期）采用欧元。