MSF中的英文
最近正在拜读MSF，但是其中的一些英文单词比较别扭，因为不了解美国的文化，因此也只能写这篇Post来征求一下意见，这些单词到底应该如何理解？
metaphor
这个单词，中文意思为比喻，暗喻，但是以这个意思去理解这段英文的中文含义总是有点不通顺（唉！讲课的时候不能让学生自己去总结它的意思啊）:
metaphors
One of the most obvious metaphors in computer applications is the menu. A menu
in a restaurant provides you with a list of available items from which you can select
what you want. When you try to order something that is not available, the
waitperson informs you of that fact and you make another selection. A computer
menu provides the same type of functionality by providing a list of available and
unavailable options from which you can select what you want.
从文中来看，应该是用菜单作了一个例子，就是将计算机应用程序中的菜单和现实生活中的菜单作类比，因此，我这里就把这个单词当类比理解。
Breadcrumb trail navigation
这是一种什么导航？URL上面的链接也已经失效了。
后来，在网上发现这么一种说法：
breadcrumb trail 出自格林童話《糖果屋》中，兩兄妹尋路到森林裏時，曾沿途丟一些麵包屑好認路回來。在網站設計領域指的是提示使用者現行網頁位置的資訊。
One of the key benefits of Windows-based applications is that they typically do
not constrain a user to an input sequence, so users have more control. You
should also consider adding breadcrumb trail navigation functionality to the
interface. This type of navigation shows the path the user has navigated to get to
the current position. To see an example of a Web site that uses breadcrumb trail
navigation functionality, see the article “The Developing Phase,” on the MSDN
Web site, at
http://msdn.microsoft.com/library/en-us/dnsolac/html/m05_develphase1.asp
那么这种导航方式就叫做“面包屑导航”？好像有点土哦！