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.
單一市場被喻為歐盟“王冠上的寶石”。它與單一貨幣、申根免護照通行區一道，代表著歷史上意義最重大的自發性主權共享嘗試。
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