纪元名称是日历用来指代从某个固定点或事件计算的一段时间的名称。

The era name is the name a calendar USES to refer to a period of time reckoned from a fixed point or event.

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第二阶段的电影在现有的角色上进行了剧情拓展，还引入了新角色，例如2015年的《复仇者联盟2：奥创纪元》和《蚁人》。

The second expanded on the existing characters and introduced new ones, in such films as 2015's "Avengers: Age of Ultron" and "Ant-Man."

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渐新世纪第三纪始新世与中新世之间的地质纪元，大约从三千八百万年持续到二千五百万年前的一段时间。

Oligocene a geological epoch in the Tertiary, between Eocene and Miocene, lasting from about 38 to 25 million years ago.

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