era
/ˈɪərə; `ɪrə/ n[C]
1 period in history starting from a particular time or event 纪元; 年代; 时代
the Elizabethan era 伊丽莎白时代.
2 period in history marked by an important event or development （以重大事件或重要发展为标志的）历史时期, 时代
the era of the miniskirt 超短裙时代
We are living in the computer era. 我们正生活在计算机时代.