epoch
- 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