1、
According to the age of the grave , archaeologists determined that these slips to 278 BCE.
考古学家根据墓葬的年代,判断竹简本的成书不会晚于公元前278年.
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2、
3、
According to Chinese tradition, the history of silk begins in the 27th century BCE.
根据中国传统说法，丝绸的历史于公元前二十七世纪就开始了。
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