说明：系统服务程序，全手工打造，对于一个开发者来说绝对是一份难得的资料。

System services, all hand-built, for a developer is definitely a rare item.

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该研究是体育社会学科建设的新成果，是一本优秀的体育理论与实践有机结合的读本，更是难得的研究运动员行为的重要文献资料之一。

This book is the new fruit of social research on P. E. combining theory and practice and it will be an important reference for the research on sportsmen behaviors.

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