a group of three people who are in control of an activity or organization

The shape of post-war Europe was decided in Potsdam in 1945 by the Allied triumvirate of Churchill, Truman, and Stalin. 战后的欧洲格局是1945年在波茨坦由同盟国三巨头丘吉尔、杜鲁门和斯大林确定的。