乌克兰总统泽连斯基：我们还讨论了制裁俄罗斯的必要性、双边贸易、防务合作、战场局势以及未来交换战俘等问题。对俄罗斯的压力必须持续下去，直到它准备好停止战争。我们还讨论了为实现公正和可持续和平而采取的共同步骤。

Group 1 - The necessity of sanctions against Russia was discussed, emphasizing the need for continued pressure until Russia is ready to cease hostilities [1] - Bilateral trade, defense cooperation, battlefield situations, and future prisoner exchanges were also key topics of discussion [1] - Joint steps towards achieving a just and sustainable peace were outlined as part of the discussions [1]