本文从公允价值相关概念的理论辨析入手，重点剖析了公允、公平交易等含义，从而引出公允价值的定义；
The dissertation begins with some of the concepts about fair value, analyzes the meaning of fair and fair trade, then the definition of fair value.
从装备更新的概念入手，简要介绍了几种装备更新的分析方法，如最低费用法、MAPI法、经济寿命法等。
Started with the conception of equipment renewal, several equipment renewal methods are introduced briefly, including lowest-fee method, MAPI method and economic lifetime method.
从攻击性防守的概念入手，对篮球攻击性防守的特点及攻击性防守的训练等问题进行了综合分析。
In the paper, the concept of attacking defense is discussed, its features are comprehensively analyzed and then the concrete methods of relative training are provided.
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