In recent years, frequent primary and secondary injuries become a major problem, which disturbed normal school education and teaching activities.
近年来，频发的中小学生伤害事故成为困扰学校正常教育教学活动的一大难题。
In recent years, frequent primary and secondary injuries become a major problem, which disturbed normal school education and teaching activities.
近年来，频发的中小学生伤害事故成为困扰学校正常教育教学活动的一大难题。
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