U.S. Secretary of State John Kerry is in Vienna for high-level nuclear talks as a deadline looms just four days from now for a comprehensive agreement on Iran's atomic program. VOA's Al Pessin reports: 美国国务卿约翰`克里在维也纳参加高层核会谈,这距离伊朗原子能项目达成综合共识的最后期限仅剩四天. "Secretary Kerry and other western officials say Iran must still make the strategic decision to accept limits on its nuclear program -- a move that would contradict the so-called red lines' set by its supreme leader earlier this year. "克里国务卿和西方其他官员称,伊朗仍然必须做出接受限制其核项目的战略决策--这一举措将颠覆其最高领导人今年早些时候设置的所谓红线. ____________________________ "We're not talking about an extension, not among ourselves. We have not talked about the ingredients of an extension. We're talking about getting an agreement." Still, Kerry said he would be willing to look at the possibility of an extension if the talks go to "the final hour." "我们相互之间并没有讨论延期.我们没有谈论延期相关的内容.我们讨论的是达成一份协议."尽管如此,克里也表示如果会谈能进入"终结时刻",他也愿意考虑延期的可能性. Al Pessin, VOA News, Vienna." This is VOA News. 艾尔`佩辛,VOA新闻,维也纳报道." 这里是VOA新闻.