求翻译：其中研究内容包括现代排球运动战术的概念界定、战术系统特征、战术系统制约影响因素、战术系统类型、战术系统结构、战术系统层次、战术系统构成要素及其功能定位。是什么意思？

The study includes the definition of modern volleyball tactical characteristics of tactical systems, tactical systems constraints influencing factors, the type of tactical systems, tactical system structure, the level of tactical systems, tactical systems elements and their functional orientation.

Some of the content including modern volleyball tactics of the concept definition, tactical system characteristics, governed tactical system impact factor, and tactical system type structure of the system, and tactical levels, tactical system, and tactical elements of a system and its functions.

Research content including modern volleyball movement tactic concept limits, tactical system characteristic, tactical system restriction influence factor, tactical system type, tactical system structure, tactical system level, tactical system integrant part and function localization.

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正在翻译，请等待...