And the students do that after their class time and their behind-the-scenes meetings and tours.

VOA: standard.2010.02.26

The middle class guys behind the screen who are going to invest in these long treks.

那些幕后的中产阶级们,他们打算对这些长途贸易投资

耶鲁公开课 - 欧洲文明课程节选

I should tell you first of all that in this class, the taping is not going to affect you because the camera is going to be behind your head.

我想跟你们强调的是,录像将不会影响你们,因为摄像机在你身后

耶鲁公开课 - 基础物理课程节选

If you walk into a class with 5th graders, who on day one are years behind where they should be and hate school and are kind of like to hate you because of it.

如果你走进一个五年级教室，学生们从第一天开始就落后很多,恨学校，因此也恨你。

哈佛公开课 - 幸福课课程节选