The old man was dead as a doornail .

那老头已经直挺挺地死了。

He drove into a tree at over a hundred miles an hour and is as dead as a doornail .

他以每小时100多英里的速度驾车。结果撞在一棵树上，一命呜呼。

Many chinese superstitions should be as dead as a doornail .

许多中国的迷信应该成为僵尸。

The treaty may be considered to be as dead as a doornail .

这项条约可以认为是完全作废了。

Times are bad , the market is dead as a doornail .

时势不好，市面清得不成话。