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Jyutping sam1 gau3
Pinyin shēn jiù

Definitions (Wiktionary)
  1. verb
    to go into a matter seriously; to get to the bottom of a matter
    (syn.) 追查, 追究

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Jyutping sam1 gau3
Pinyin shēn jiū

Definitions (CC-CEDICT)
  1. to perform an in-depth investigation
Definitions (粵典–words.hk)
  1. 動詞
    深入​查究​;​追究
    to look deep
Definitions (Wiktionary)
  1. verb
    to go into a matter seriously; to get to the bottom of a matter
    (syn.) 追查, 追究
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)