最近五年以来美国《古代中国》上的学术成果夏含夷《剑桥中国史》主编ＤｅｎｉｓＴｗｉｔｃｈｅｔｔ在该通史第一辑──《秦汉史》的序言中说明：《剑桥中国史》之所以从秦汉时开始而略掉先秦时代，是因为在６０年代当他和剑桥大学出版社开始筹备这一项目时，中国先秦史学... The Academic Achievements of the Ancient China in the Past Five Years DenisTwitchett, Editor-in-Chief of Cambridge History of China, in the Preface to the History of the Qin and Han Dynasties in the First Chapter of the History of the History of China: The History of Cambridge, China begins with the Qin and Han Dynasties Slightly omitted the pre-Qin era, because in the 1960s when he and Cambridge University Press began preparations for this project, China's pre-Qin history ...