伊核：备战紧锣密鼓，谈判前景难卜

Group 1 - The article discusses the uncertainty surrounding the timing and outcome of the second round of negotiations between the US and Iran regarding the nuclear issue, highlighting the potential for military escalation if talks fail [1][9]. - President Trump has indicated the possibility of deploying a second aircraft carrier strike group to the Persian Gulf if negotiations do not succeed, signaling a heightened military readiness [2][10]. - The first round of negotiations, which took place on February 6, did not yield positive results, and subsequent US sanctions were announced, complicating the diplomatic landscape [4][5]. Group 2 - Israeli Prime Minister Netanyahu's visit to the US is aimed at urging Trump to intensify both diplomatic and military pressure on Iran, particularly regarding missile restrictions and support for regional proxies [5][6]. - Iran has signaled a willingness to negotiate on uranium enrichment and potentially expand discussions to other areas, such as missile limitations and oil cooperation, which could influence US military decisions [7][8].