Like all markets, the EU’s Single Market is a political construct that relies on common rules, regulations, and conventions for stability and reliability. Returning to national governments rule-making powers that could be used to impose criteria aimed at excluding others would endanger the entire market.
和所有市场一样，欧盟单一市场是基于共同规则、监管和稳定性和可靠性惯例的政治产物。回归国家政府规则制定会造成排他的标准，破坏整个市场。