This cute little door-mouse is as dead as a doornail.

这个可爱的小老鼠像门钉一样牢固。

It lie there with its eyes closed, dead as a doornail.

它躺在那里眼睛闭着，确实死了。

All the television pundits said I was dead as a doornail.

所有的电视评论员都说我“必死无疑”。

For God sake, I'm gonna be as dead as a doornail in five days.

算啦，我五天后就死翘翘了。

I don't mean to say that I know of my own knowledge what there is particularly dead about a doornail.

我的意思并不是说，一根钉死在门上的门钉有什么特别之处，至少就我所知是没有。