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former Soviet Union
旧ソ連崩壊は冷戦の終わりを告げた。
The collapse of the former Soviet Union heralded the end of the Cold War.
旧ソ連の宇宙開発技術は先駆的だった。
The space development technology of the former Soviet Union was pioneering.
旧ソ連の経済は中央集権的な計画経済に基づいていた。
The economy of the former Soviet Union was based on a centralised planned economy.