But I am telling you this after you already signed up for the class so it is too late to leave.

我在你们选了这门课后才挑明,想退课也晚了。

哈佛公开课 - 幸福课课程节选

Let's say I got up late and I am racing to get to class.

比如，我起晚了,我冲向教室。

麻省理工公开课 - 固态化学导论课程节选

I do try to start a few minutes late, but I also have to finish a few minutes early so you can go to your next class.

我已经推迟上课好几分钟了,我还得提前下课,好让你们能赶上下一节课

耶鲁公开课 - 基础物理课程节选