美国国务院：美国、巴西与俄罗斯等国讨论军备控制问题。

Core Viewpoint - The U.S. State Department is engaging in discussions with Brazil, Russia, and other countries regarding arms control issues [1] Group 1 - The discussions aim to address military capabilities and the need for regulation in arms proliferation [1] - The involvement of multiple countries indicates a collaborative approach to global security concerns [1] - The focus on arms control reflects ongoing geopolitical tensions and the necessity for dialogue among major powers [1]