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通过对中、日两国 8～ 1 8岁男学生体质现状的调查 ,对比找出中、日两国 8～ 1 8岁男子学生在体质上存在的差异 ,并探究产生这种差异的原因
Through the investigation of the physical status quo of male students between 8 and 18 in China and Japan, we find out the difference in body constitution among 8 ~ 18-year-old male students in China and Japan and find out the reasons for the differences