如果我们用视觉符号和惯用型来表示在界面上的物体，我们的大脑便可以迅速地识别出这些不同的物体。
Our brains can rapidly differentiate objects in an interface if we represent what objects are by using visual symbols and idioms.
如果使用的是标准代码，标准语义文档和非表格布局，那么你的代码将看上去非常清楚，简直就如同一个带有一些特殊符号的惯用文本。
If you are using standard code, semantic document conventions, and a tableless layout, your code can be so clean that it looks practically like just regular text with a few extra symbols.
图13 - 1这是个习惯用法符号，从开始使用就被赋予了有别于其他事物的特殊含义。
Figure 13-1: Here is an idiomatic symbol that has been imbued with meaning from its use, rather than by any connection to other objects.
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