欧盟委员会主席冯德莱恩：欧洲在与美国的贸易谈判中必须展现出实力。

Group 1 - The core viewpoint emphasizes that the European Union must demonstrate strength in trade negotiations with the United States [1] Group 2 - The statement reflects the EU's strategic approach to enhance its bargaining power in international trade discussions [1] - The need for a unified stance among EU member states is highlighted to effectively negotiate with the US [1] - The comments suggest a proactive strategy to address trade imbalances and protect European interests [1]