n.large Australian swan having black plumage and a red bill
同义词：Cygnus atratus
black swan例句
Black Swan 'Black Swan' BLACK SWAN The Black Swan (1999 book) A Black Swan in the Money Market Syndrome of the black swan. The Black Swan: The Impact of the Highly Improbable The Black Swan: The Impact of the Highly Improbable The Black Swan: The Impact of the Highly Improbable The Black Swan: The Impact of the Highly Improbable The Black Swan: The Impact of the Highly Improbable. The black swan : the impact of the highly improbable On the dynamics of social conflicts: looking for the Black Swan
