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A group of multi ethnic of students kids and teachers study learn on test tube in lab or laboratory in school medical chemistry. Experiment science. Education in classroom. People lifestyle

视  频 ID：  1087544720
版      权：  Tam Patra
视频长度：  0:13
横纵比率：  16:9
所属分类：  人物 教育 
商业用途（模特授权书存在站酷海洛）
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