特殊的乡情，使黄集乡中学的留守青少年比例占到全校学生的45.5%，越轨行为发生率也比较高，具有研究的典型性意义。
Therefore , all above mentioned give rise to a 45.5 % of left-behind teenagers in proportion to the whole school and a higher rate of transgression behavior , which are of typical significance .
黄集乡