「ブラックスワン」は参照できます
1.主にオーストラリアの南東部と南西地域で繁殖する白鳥。
2.驚きとして来るイベント、あなたは大きな効果があり、事実の後に合理化されたInapprofrialyから外れています。

どちらについてもっと知りたいですか？
"Black swan" can refer to either
1. A large waterbird, a species of swan which breeds mainly in the southeast and southwest regions of Australia.
2. An event that comes as a surprise, has a major effect, and is often inappropriately rationalized after the fact.

Which one would you like to learn more about?