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Jyutping gu2 doi6 si2
Pinyin gǔ dài shǐ

Definitions (CC-CEDICT)
  1. ancient history
Definitions (Wiktionary)
  1. noun
    ancient history
    (syn.) 上古史, 古史
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)