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era (EN)
名詞

名詞 “era”

単数 era、複数 eras
  1. 時代
    The Victorian era is known for its significant advancements in industry and culture.
  2. 地質時代 (地球の歴史上の長い期間を指す)
    The Mesozoic era, known for the reign of dinosaurs, lasted about 180 million years before giving way to the Cenozoic era.