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epoch

英 ['i?p?k; 'ep?k] 美['?p?k]
  • n. [地質(zhì)] 世；新紀(jì)元；新時(shí)代；時(shí)間上的一點(diǎn)

英英釋意

1. a period marked by distinctive character or reckoned from a fixed point or event
2. (astronomy) the precise date that is the point of reference for which information (as coordinates of a celestial body) is referred
3. a unit of geological time