Swans were holy to Apollo, the god of poetry and song.

VOA: special.2010.04.11

Talib, who's a Wall Street professional, talks about these black swans as being the real story of finance.

华尔街的专家塔利博,用金融界的真实案例讨论黑天鹅现象

耶鲁公开课 - 金融市场课程节选

He called it The Black Swan because if you look at swans, they're always white.

他称之为黑天鹅现象,因为我们看到的天鹅总是白色的

耶鲁公开课 - 金融市场课程节选

So, you end up going through life assuming that there are no black swans.

于是你从生活中得出结论,黑色的天鹅是不存在的

耶鲁公开课 - 金融市场课程节选