Last week, EU negotiators said they are open to an alternative to the backstop -- but Irish deputy Simon Coveney said Friday London hasn't yet submitted a "serious" proposal.
上周，欧盟谈判代表表示，他们愿意接受一种边境保护措施替代方案，但爱尔兰代表西蒙·柯文尼上个星期五表示，伦敦方面尚未提交一份“认真的”提议。