这表明了达成全面协议难度有多大，告诫我们国际努力或许只能订立一系列推迟伊朗核武器计划的小协议，而不可能彻底消除伊朗的核威胁。
This points to the difficulty of achieving a comprehensive agreement and the possibility that the international effort could result only in a series of small deals aimed at delaying Iran’s acquisition of a nuclear weapon rather than removing the threat of it altogether.