The special running practice is an effective means to improve the running marks and techniques.

跑的专门性练习是掌握技术，完善技术，提高跑的成绩的有效方法和手段。

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The special running practice is an effective means to improve the running marks and techniques.

跑的专门性练习是掌握技术，完善技术，提高跑的成绩的有效方法和手段。

youdao