再次，将所有战术活动划分为8个基础活动类型，并用解析法建立相应的战术活动模型。
Thirdly, all the tactical actions are divided into 8 basic actions, and the corresponding tactic models are built by using analytical method.
采用理论分析、行为解析、观察、访谈等方法，对网球运动中重要的环节——接发球的基本技术和战术进行了比较全面的探讨。
Through using the method of theoretical analysis, observation and interview, this paper made comprehensive discussion on basic technique and tactics of receive a service of tennis.
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