Dodo是一种鸟，这个短语是什么意思呢？请看对话：

    A: Did you smoke on the balcony just now?

    B: Yes. But I don’t smoke very often.

    A: I hope you don’t. The perception that smoking is cool is now as dead as a dodo. Besides, it’s really bad for your health.

    Note: “As dead as dodo” means “unambiguously and unequivocally dead.” The dodo was a flightless bird somewhat like a turkey. It was native to Mauritius. The last live specimen was seen in 1662 and they are thought to have died out completely by 1690. The extinction of the species is attributed to the introduction of domestic animals to Mauritius following the first visits to the island by the Portuguese in 1507 and the later settlement by the Dutch — although the species was thought to be then already in decline.