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Jyutping gung1 jan1 sik1
Pinyin gōng yīn shì

Definitions (CC-CEDICT)
  1. common factor
  2. common divisor (of a math. expression)
Definitions (Wiktionary)
  1. noun
    common factor
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)