它涉及到多部欧盟条约。由于托尼·布莱尔1997年终止了选择退出条款，这意味着只有经所有成员国同意英国才能恢复它。

This has been sprinkled around various EU treaties since Tony Blair ended the opt-out in 1997, meaning that its measures could only be restored to Britain with the agreement of all member states.

youdao

这一条约还包含一个让某一成员国离开欧盟的所谓“退出条款”，这可真算得上是个新鲜事物。(虽然该条约还没有给予欧盟将桀骜不驯者红牌罚出场外的权力。)

It also contains the novelty of an exit clause, letting a country leave (though not yet giving the EU the power to throw a recalcitrant out).

youdao

公司似乎不会拿最大的那单，因为那份限制了潜在的退出机制，而且雇佣条款很苛刻。

The company may not take the highest valuation offered -it limits potential exits and makes hiring harder.

youdao