Over the last five years, it has confronted a seemingly endless series of tests, including a eurozone-wide financial crisis, Russia’s invasion of Ukraine, renewed fears of a Greek default, and the prospect of a British exit. But none has raised such fundamental questions about the meaning of the EU as the current debate about migration.
欧洲从来都不乏挑战。过去五年来，欧盟面临着一系列看似无穷无尽的考验，包括波及整个欧元区的金融危机、俄罗斯入侵乌克兰、希腊重现违约担忧以及英国退出欧盟的隐患。但都没有像现在的移民讨论那样对欧盟的存在意义提出如此根本性的挑战。