| 词汇 | era |
| 词根词缀 | 词源： 1615, from L.L. æra, era "an era or epoch from which time is reckoned," probably identical with L. æra "counters used for calculation," pl. of æs (gen. æris) "brass, money" (see ore). The L. word's use in chronology said to have begun in 5c. Spain (where, for some reason unknown to historians, the local era began 38 B.C.E.; some say it was because of a tax levied that year). Like epoch, in Eng. it originally meant "the starting point of an age;" meaning "system of chronological notation" is c.1646; that of "historical period" is 1741. 词根记忆： n. 时代,年代,阶段,纪元The rational operator started a new era of opera cooperation in AD 2000.理性的操作者在公元2000年开创了一个歌剧合作的新时代. |
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