era
美 [ˈɪrə] 
英 [ˈɪərə] 
- n.新时期;纪元;年代;新时代
 - 网络防御率(Earned Run Average);反应装甲(explosive reactive armor)
 
复数:eras  
v.+n.
enter era,inaugurate era,herald era,mark era
adj.+n.
golden era,early era,bygone era,past era
era
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1.  | 时代;年代;纪元a period of time, usually in history, that is different from other periods because of particular characteristics or events  | 
the Victorian/modern/post-war era 维多利亚女王╱当今╱战后时代  | |
When she left the firm, it was the end of an era(= things were different after that) . 她离开公司后,一个时代结束了(后来的情况就大不一样了)。  | 
2.  | 代(地质年代,宙下分代)a length of time which is a division of an aeon  |