0:00/0:06
倍速
  • x2
  • x1
  • x0.5
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Slide in over empty desks in a college lecture hall. The abandoned chairs and tables sit absent of students in front of a chalkboard and projector screen.

视  频 ID：  31530136
版      权：  Charlotte Kramer
视频长度：  0:06
横纵比率：  16:9
所属分类：  背景 教育 
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