Now, from Khan Academy, we saw that short 10-minute videos worked much better than trying to record an hour-long lecture and put it on the small-format screen.
现在，我们可以在Khan Academy看到 这些短短10分钟的视频 这些东西比那些在一个小屏幕 播放足足一小时的视频讲座 效果要好多了