postbox相关的词根或词缀是: post-

If I had to choose a single image that , for me , represents britain today , it would not be a phone box or a postbox .

如果我要选择一个代表了今日英国形象的话，对我来说那将不是一个电话亭或是一个邮筒。

But half a dozen businessmen , asked about the window , hoot with laughter . It is nothing more than a postbox , says one ; the papers are simply shuffled on to the same old unresponsive departments .

一名商人说，这窗口充其量也就是个邮筒，那些文件被简单的混在得过且过的部门里。