an expert in or student of history, especially that of a particular period, geographical region, or social phenomenon
(尤指对特殊时期、地理区域或社会现象研究的)历史学家(或研究者)
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a military historian. 军事历史学家。
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historiann.历史学家
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historicaladj.历史的;有关历史的;有关过去事件的
"late Middle English: from Old French