If Europe's leaders sign up for a level of integration deeper than voters want, the backlash could split the EU apart-exactly the outcome they are trying to avoid.

如果欧洲的领导人同意的一体化程度比选民所希望的要深，那么选民的激烈反应可能会使欧盟分崩离析，而这恰恰是他们努力避免的情况。

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One way of looking at Belgium's divide is as a counterpart to the EU's split between a Germanic, frugal north and a subsidy-dependent Latin south.

ECONOMIST: Charlemagne

In 2011, it split the EU over its staunch opposition to military action in Libya.

WSJ: Syria Debate Illustrates EU's Foreign-Policy Weakness

EU, the authors split selected member countries into two groups: the core and the periphery.

ECONOMIST: Economics focus