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1. Oxford Dictionary

   black swan

   • n.
     a mainly black swan with white flight feathers which is common in Australia and Tasmania and has been introduced elsewhere.；an unpredictable or unforeseen event, typically one with extreme consequences

   • noun: black swan, plural noun: black swans

2. • 釋義

   n.

   名詞

   • 1. a mainly black swan with white flight feathers which is common in Australia and Tasmania and has been introduced elsewhere.
   • 2. an unpredictable or unforeseen event, typically one with extreme consequences the bank industry's vulnerability to black swans black swan events always look eminently predictable in hindsight, yet no one ever predicts them
3. • 更多解釋

   black swan

   • IPA[ˈblak ˈswän]

   美式

   • n.
     a mainly black swan with white flight feathers which is common in Australia and Tasmania and ...

   Oxford American Dictionary