The EU’s single market is called the jewel in the bloc’s crown. Together with the single currency and the Schengen passport-free travel area, it represents one of history’s most consequential voluntary efforts to share sovereignty.
单一市场被喻为欧盟“王冠上的宝石”。它与单一货币、申根免护照通行区一道，代表着历史上意义最重大的自发性主权共享尝试。
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