首頁英語詞典epochepoch英英釋意

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