... 标记卡阅读器 badge card reader 标记类 marking class 标记类型 tag type ...
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5 class marking system 级记分制
social class marking 阶级标示
·2,447,543篇论文数据，部分数据来源于NoteExpress
That statistic grossly under represents the huge amount of work that most teachers put in outside the school day (preparing class materials, marking papers, etc).
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