Eras
n. 紀元, 時代；年代（era的復數形式）
??? 情景例句
History repeats itself.
歷史往往會重演。
Where's the door?
門在哪兒？
But of course, he can learn by himself. He has a book and a dictionary.
但當然，他也可以自學。他有書和詞典。