英语词汇“black swan”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	black swan
释义	Word Frequency black swan noun 1. a large Australian swan, Cygnus atratus, that has a black plumage and red bill 2. a phenomenon that occurs even though it had been thought to be impossible Word origin sense 2 from the fact all swans were thought to be white until black swans were discoveredin Australia
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