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Jyutping bat1 kei4 jin4 ji4 jin4
Pinyin bù qí rán ér rán

Definitions (Wiktionary)
  1. noun
    to happen unexpectedly; to turn out contrary to one's expectations
    (syn.) 不期而然

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Jyutping bat1 kei4 jin4 ji4 jin4
Pinyin bù qī rán ér rán

Definitions (CC-CEDICT)
  1. happen unexpectedly
  2. turn out contrary to one's expectations
Definitions (Wiktionary)
  1. noun
    to happen unexpectedly; to turn out contrary to one's expectations
    (syn.) 不期而然