economic hierarchy scheme 经济阶层结构模式
As part of a scheme, specialized DITA map elements specify the relationships that define a thesaurus or taxonomy hierarchy (see Figure 3).
作为方案的一部分，专门化的dita图元素指定的关系定义了辞典或分类法的层次结构(请参阅图3)。
In this scheme, objects are represented by Pointers, and GtkWidget is the basic type — called a class — in the GTK + hierarchy from which all other classes are derived.
在这个方案中，对象由指针代表，而GtkWidget是GTK +层次结构中的基本类型——叫做类，其他类都从它派生而来。
The logical key hierarchy (LKH) scheme is the most efficient protocol for key management in the field of multicast at present.
逻辑密钥层次（LKH）方案是目前多播领域中最有效的密钥管理协议。
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