乌克兰总统泽连斯基：已下令扩大与美国的联系，以确保关键物资的及时交付，主要包括防空系统。

Core Point - Ukrainian President Zelensky has ordered an expansion of ties with the United States to ensure timely delivery of critical supplies, primarily focusing on air defense systems [1] Group 1 - The directive aims to enhance cooperation with the U.S. to secure essential military resources [1] - The emphasis is placed on air defense systems as a critical component of Ukraine's defense strategy [1]