One of the hands keeps a flat hand shape and it just kind of lightly moves back and forth as if it were a flickering image on a screen."
VOA: special.2011.04.13
This is--If you'll hold out your hand and--one hand flat.
如果你伸出手,手伸平
耶鲁公开课 - 心理学导论课程节选
应用推荐
模块上移
模块下移
不移动