如果说一个东西 as dead as dodo, 意思就是这个东西已经不再重要了，过时了。我们通常使用这个短语来谈论思想或潮流。

例句

In the past people used to watch and record videos on VHS, but now that format is as dead as a dodo.

The perception that smoking is good for your health is now as dead as a dodo.

请注意

我们用 dead duck 来形容一件事情不怎么成功。

Frank's coffee shop business was a dead duck sadly. His coffee was just awful, and the shop was in a bad location.