This paper Introduced USB device sort and its logic structure level relation in summary.
扼要介绍了USB设备的分类及其逻辑结构层次关系。
This paper had summarized the structure, distribution, activity, expression of PAI-1 and the relation of its level with cerebral embolism.
文章概述了PAI - 1的结构、分布、活性及其表达，以及PAI - 1水平同脑血栓的关系。
On the basis of class and in accordance with the level structure and the inheritance relation of class, a rule base is constructed by using linked lists.
它以类为基础，并根据类的层次结构和继承关系用链表来构造规则库。
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