The students are engaged in the lecture-station format, 50% you would typically have 50% attendance even with the best lecture.

在普通的讲座-背诵式课堂,学生的出勤率，通常是,即使是最好的讲座也如此。

麻省理工公开课 - 媒体、教育、市场课程节选

One of the things I want to emphasize, that I've not emphasized already, is attendance here in the lectures is very much required.

有一点我想强调，之前没说到，请不要缺课。

耶鲁公开课 - 新约课程节选

We will be taking attendance in the lecture.

我们上课要点名的

耶鲁公开课 - 聆听音乐课程节选