虽然不确定因素仍然很多，但有一点十分明确，即如果英国想要保留单一市场准入权，就必须接受包括劳动力自由流动在内的欧盟四项自由政策。
While much remains uncertain, what is clear is that if the UK wants to retain access to the European single market, it will have to accept the EU’s four freedoms, including the free movement of workers.