火车票退票费报销凭证:as mad as a door 是什么意思?

as mad as a door as mad as a door 是什么意思? 关于as mad as a door中的door 为什么用a door instead of a wet hen? A man is as mad as a door. mad as hell如何翻译？？？ as white as是什么 as light as a feather as是什么? life as a dog译成中文是什么 Run a DLL as an App是什么??