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.
據瞭解會談情況的人士稱，西方大國一直在努力說服警惕的伊朗領導人簽訂一項協議，以重啓2015年的伊朗核協議，而卡達在爲美國和伊朗進行調解方面發揮了更大的作用。
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