Union of Soviet Socialist Republics
演变路径（由近及远）
词源说明
Calque of Russian Сою́з Сове́тских Социалисти́ческих Респу́блик (Sojúz Sovétskix Socialistíčeskix Respúblik).
释义（英文）
专有名词 Proper noun
- (historical) A former transcontinental country in Europe and Asia (1922–1991), now split into Russia and 14 other countries; short form Soviet Union; abbreviation USSR.