0:00/0:12
倍速
  • x2
  • x1
  • x0.5
举报

Teenage boy entering class with tablet presenting cube formula on board inviting student response. Education classroom presentation youth mentorship learning technology

视  频 ID:  3925894995
版      权:  vectorfusionart
视频长度:  0:12
横纵比率:  1.89:1
所属分类:  教育 
商业用途(模特授权书存在站酷海洛)

如何选择