综合美国《纽约时报》等媒体此前报道，特朗普近日威胁称，如果俄罗斯和乌克兰50天内没有达成和平 协议，美国将对俄罗斯征收"非常严厉"的关税。之后他又将这一期限缩短到10至12天。对此，俄罗斯联 邦安全会议副主席梅德韦杰夫在社交媒体上回应称，特朗普对俄罗斯的每一次通牒都是一种威胁。梅德 韦杰夫还称，俄方何时坐到谈判桌前不应由特朗普来决定。 特朗普随后称，鉴于梅德韦杰夫"极具挑衅性"的言论，他已"下令将两艘核潜艇部署到适当区域"。据塔 斯社8月2日报道，俄罗斯国家杜马（议会下院）议员列昂尼德·伊夫列夫表示，对俄罗斯来说，特朗普 下令调往"适当区域"的两艘核潜艇并不是"新威胁"，俄已做好应对准备。 【环球网报道】综合美国《国会山报》等媒体报道，继向俄罗斯放话称"已下令将两艘核潜艇部署到适 当区域"后，美国总统特朗普当地时间3日称，美国核潜艇已被部署到有关区域。 据《国会山报》报道，当被问及核潜艇是否已被部署到位的问题时，特朗普当天对记者称，"我已发表 一份声明，答案是它们已在那个地区，在它们不得不被部署的区域"。 ...

Group 1 - Russian President Putin expressed a desire to continue dialogue with Ukraine, indicating patience if Ukraine currently sees no need for contact [2][4] - The recent negotiations between Russia and Ukraine in Istanbul yielded positive outcomes, including the exchange of deceased soldiers and prisoners [4] - Putin emphasized the importance of addressing the root causes of the current crisis to facilitate peace [4] Group 2 - U.S. President Trump ordered the deployment of two nuclear submarines in response to provocative statements from Russian officials, although he did not specify the type of submarines or their deployment area [5][6] - Trump previously threatened severe tariffs on Russia if a peace agreement between Russia and Ukraine was not reached within 50 days, indicating a potential escalation in U.S. pressure on Russia [6] - Russian officials, including Medvedev, responded to U.S. threats by asserting that the timing of negotiations should not be dictated by the U.S. [6]