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(1) 年(時(shí))代，紀(jì)元 (period of time marked by an important event or events)[C]：the industrial/postwar～工業(yè)/戰(zhàn)后時(shí)代; the～of the atom/computer/space travel/steam engine 原子/計(jì)算機(jī)/星際旅行/蒸汽機(jī)時(shí)代; an～of progress/of social reform 進(jìn)步/社會(huì)改革的時(shí)代; be/live/usher in a great～of world peace 處于/生活在/迎來世界和平的時(shí)代; inaugurate/mark a new～開創(chuàng)/標(biāo)志一個(gè)新時(shí)代; 〖同〗 period，age，time，interval;

(2) (地質(zhì))代 (one of the five very large divisions of time in geological history) [C]：the Cenozoic/Mesozoic/Paleozoic/Proterozoic/Archeozoic～新生代/中生代/古生代/原生代/太古代;

【辨異】era與age、period和epoch的區(qū)別見AGE。