We have not yet perfected the art of entering and exiting this classroom yet, we're still working on that. Raise your hand if you need notes and we'll make sure we get those to you.

我们目前还没有把,进出教室的技术做的很好，我们仍在做这件事,如果你没有拿到讲义请举手,我们会被把讲义发给你。

麻省理工公开课 - 化学原理课程节选