n. (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded
n. a unit of geological time that is a subdivision of a period and is itself divided into ages
n. 新纪元, 时代, 时期
1. The scientist explained that we are currently in a new epoch of climate change.
科学家解释说，我们目前正处于一个气候变化的新纪元。
2. The discovery of fire marked an important epoch in human history.
火的发现标志着人类历史上一个重要的纪元。
3. Many people believe that the digital age is an epoch that will change the world forever.
许多人相信，数字时代是一个将永远改变世界的纪元。