Qatar has stepped up its role in mediating between the US and Iran as western powers have been striving to convince wary Iranian leaders to ink a deal to revive the 2015 nuclear accord, according to people briefed on the talks.
据了解会谈情况的人士称，西方大国一直在努力说服警惕的伊朗领导人签订一项协议，以重启2015年的伊朗核协议，而卡塔尔在为美国和伊朗进行调解方面发挥了更大的作用。
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