学习，学习（二回）

深夜整理Understanding Users的笔记，发现一个名词：Breadcrumb trail。啥玩意啊这是？查查Wikipedia才知道：

a navigation technique used in user interfaces. Its purpose is to give users a way to keep track of their location within programs or documents. The term is taken from the trail of breadcrumbs left by Hansel and Gretel in the popular fairytale.

也就是说，就是Nautilus下的那个导航栏：

为了找到回来的路而洒下的面包屑（Breadcrumb），相当形象...