So okay, let's have a look. Did anyone choose -- raise your hands, Be brave here.

好的,我们看一看,有人选了吗,请大家踊跃举手

耶鲁公开课 - 博弈论课程节选

There's just enormous participation from customers.

客户踊跃参与。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

Comment it up.

踊跃发言吧。

麻省理工公开课 - 计算机科学及编程导论课程节选