a former communist country in eastern Europe and northern Asia; established in 1922; included Russia and 14 other soviet socialist republics (Ukraine and Byelorussia an others); officially dissolved 31 December 1991
发音
例句
1. During his summer vacation he visited Russia. 暑假期间他去俄罗斯了。 2. America and Russia are great powers. 美国和俄国是两大强国。