How did you alight on (upon) these ancient books?
你怎么发现这些古书的？
These ancient books are printed on paper with deckled edges, and are of poor quality.
这些古籍都是用毛边印刷的，质地不怎么好。
These books built upon the ideas of an even more ancient period codified in the Five Classics.
这些书是依照“五经”之中所体现的更为早期的思想而著成的。
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