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Professor is Teaching a Lesson at the Blackboard 剪贴画
关于4年
Teacher is Teaching at the Blackboard 剪贴画
Teacher at the podium teaching off the chalkboard 剪贴画
Professor at the chalkboard 剪贴画
Teacher at the Chalkboard 剪贴画
Woman Teacher is at the Blackboard 剪贴画
教授 剪贴画
Woman Teacher at the Blackboard 剪贴画
Professor with chalkboard 剪贴画
差不多4年
Professor at the chalkboard teaching Roman numbers 剪贴画
Teacher is at the Chalkboard 剪贴画
Teacher is at the Blackboard 剪贴画
Teacher at the Blackboard 剪贴画
African teacher at the Chalkboard 剪贴画
Professor at the Blackboard - Light Skin Tone, White Clothes 剪贴画
Teacher Erasing Chalkboard Lesson 剪贴画
Teacher and Students in a Classroom 剪贴画
Professor at the Blackboard - Dark Skin Tone, White Clothes 剪贴画
