The participants were the second grade junior middle school students.
实验以初中二年级学生为被试。
So far , the study on the left-behind junior middle school students is still rare.
但是迄今为止，对留守初中生的研究尚处于空白阶段。
So far , the study on the left-behind junior middle school students is still rare.
但是迄今为止，对留守初中生的研究尚处于空白阶段。
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