2023-03-21问：consists of the book itself
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2023-03-21问：mostly in monasteries.
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2023-03-21问：and was erased, and on cleaned
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2023-03-20问：Since the era of Charlemagne
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2023-03-20问：books in ancient times was papyrus
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2023-03-20问：ancient and medieval Latin,
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2023-03-20问：new texts were rewritten
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