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Jyutping jan4 sam1 po2 cak1
Pinyin rén xīn pǒ cè

Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)

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Jyutping jan4 sam1 po2 caak1
Pinyin rén xīn pǒ cè

Definitions (Wiktionary)
  1. phrase, idiomatic
    the human mind is unpredictable; people may harbour an evil intent