It's going to slide down and the guy in the last row is going to collect everything.
它会滚到后面,最后一排的人就把它收入囊中
耶鲁公开课 - 基础物理课程节选
Anybody want to guess from the last row what force?
最后一排有同学想猜一下还有什么力吗
Same person in the last row.
最后一排,还是那位同学
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