加拿大官员：加拿大取消了就乌克兰冲突发表联合七国集团声明的计划，原因是美国的反对。

Core Point - Canada has canceled plans to issue a joint statement with the G7 regarding the Ukraine conflict due to opposition from the United States [1] Group 1 - The cancellation of the joint statement indicates a shift in diplomatic strategy among G7 nations, particularly influenced by U.S. positions [1]