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Jyutping wai2 hak1 sing1 sing1
Pinyin wō hēi xīng xīng

Definitions (Wiktionary)
  1. noun
    bonobo; pygmy chimpanzee

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Jyutping wo1 hak1 sing1 sing1
Pinyin wō hēi xīng xing

Definitions (CC-CEDICT)
  1. bonobo
  2. pygmy chimpanzee