“北京长城杯”国际青少年足球邀请…
The Great Wall Cup of Beijing - The best international youth soccer …
究其原因，主要问题是在于青少年足球培养环节出现很多问题。
The main reason lies in the problems of youth football's training .
场上不同位置的青少年男子足球运动员特征性运动自信心水平没有差异；
There was no significant difference for junior male soccer players at different position on field.
场上不同位置的青少年男子足球运动员特征性运动自信心水平没有差异；
There was no significant difference for junior male soccer players at different position on field.
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