苏联（曾于1922-1991年存在的联邦制社会主义国家）_百度百科 苏维埃社会主义共和国联盟（俄语：Союз Советских Социалистических Республик），简称“苏联”，存在于1922—1991年由15个权利平等的加盟共和国按照自愿联合原则组成社会主义国家联盟，苏共是执政党。
Soviet Union | History, Leaders, Flag, Map, Anthem | Britannica Soviet Union (Union of Soviet Socialist Republics; U S S R ), former northern Eurasian empire (1917 22–1991) stretching from the Baltic and Black seas to the Pacific Ocean and, in its final years, consisting of 15 Soviet Socialist Republics The capital was Moscow, then and now the capital of Russia