以上来源于: WordNet
The hieroglyphs date back to the ninth century, making them hundreds of years older than the calendars in the Maya Codices, which were recorded in bark-paper books from 1300 to 1521.
这些象形文字可以追溯到九世纪，比玛雅刻本历法提早了数百年。 玛雅刻本于公元1300年到1521年记载在树皮纸做的书上。
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