The reason I am requesting this is that classroom organization has become a problem and marking on various sizes of papers has made it difficult to keep track of all student records.
我再次这样要求的原因是因为教室组织已经是一个问题，批阅不同型号纸张上的作业已经很难保存同学们的作业记录。
The utility model relates to a line marking device for a race track for track and field.
本实用新型涉及一种田径跑道划线装置。
The utility model relates to a line marking device for a race track for track and field.
本实用新型涉及一种田径跑道划线装置。
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