详细解释:苏联
词型变化：
异体字:USSR英语解释：
名词 u.s.s.r.:
a former communist country in eastern Europe and northern Asia; established in 1922; included Russia and 14 other soviet socialist republics (Ukraine and Byelorussia and others); officially dissolved 31 December 1991同义词：Soviet Union, Russia, Union of Soviet Socialist Republics, USSR