a unit of geological time that is a subdivision of a period and is itself divided into ages
a period marked by distinctive character or reckoned from a fixed point or event 同義詞:era,
(astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded 同義詞:date of reference,
其他語種釋義
epochとは意味:epoch n. 新紀(jì)元; 畫期的な出來事; 畫期的な時代; 〔地質(zhì)〕 世(せい). 【動詞+】 ◆American labor-saving inventions form an epoch in the history of the human race. アメリカにおける労働節(jié)約の諸発明は人類史上に一新紀(jì)元を畫するものだ ◆This reform marks an epoch in educ...