It tends to be a one-way flow of communication From the faculty to the students. It highly confined Students have limited opportunities to ask questions.

那是从教授到学生,单向的信息流动,这种模式限制了学生提问的机会。

麻省理工公开课 - 媒体、教育、市场课程节选

That's what this arrow at the right shows, the direction of the flow of information.

这就是右边这个箭头的含义,即信息流动的方向

耶鲁公开课 - 生物医学工程探索课程节选