Now teachers know exactly what the students have been up to, how long they've spent each day, what videos they've watched, when did they pause the videos, what did they stop watching, what exercises are they using, what have they focused on?
现在老师明白了学生真实达到的水平， 每天花多长时间，都看了那些视频， 和他们在什么地方暂停的视频，以及哪部分是停止观看的， 他们做了哪些练习， 关注点是什么？