noun
Dark Ages
Refers specifically to the historical period in Europe, often used in historical or metaphorical contexts.
中世ヨーロッパの暗黒時代について学ぶ。
Learn about the Dark Ages of medieval Europe.
noun
Generalized use for any period of decline, oppression, or lack of progress, not limited to European history.
その国は長い暗黒時代を経験した。
That country experienced a long dark age.