eras

基本解释

Of course, these individuals have been around since the beginning of human history and played a more prominent role in some eras than in others.
当然，这些个体自从人类历史开端以来就已经存在，并且在一些时代扮演着比另一些时代更突出的角色。
Personally, I really enjoyed this chapter's discussion of IBM's impact on the software industry, particularly in the mainframe and early personal computing eras.
就个人而言，我很喜欢这一章中IBM对于软件业的影响这部分内容，特别是在主机时代和个人计算时代初期。
Migrants are now connected instantaneously, continuously, dynamically and intimately to their communities of origin... This is a fundamental and profound break from the past eras of migration.
现在移民们跟他们的种族社区迅速、持续、动态和亲密地联系在了一起…这是对从前移民时代根本且深远的突破。

The elections will be held at the Winter Meetings each year and the eras will rotate.
FORBES: A Fond Farewell To The Golden Age Of Managers
The Expansion Era ballot will have 12 candidates while the other eras will only have 10.
FORBES: A Fond Farewell To The Golden Age Of Managers
And the evidence shows that across different eras, all wins are not created equally.
FORBES: The Best and Worst Baseball Teams of All Time

You can refer to a period of history or a long period of time as an era when you want to draw attention to a particular feature or quality that it has.