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Concepts on blackboard at school. Young people students and pupils in classroom. Smart hispanic girl writing math formula on board during lesson. Portrait of female child smiling looking at camera

视  频 ID:  24132553
版      权:  dualstock
视频长度:  0:10
横纵比率:  16:9
所属分类:  教育 人物 
商业用途(模特授权书存在站酷海洛)

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