Now, let me take a sidebar for about five minutes to talk about course administration, the administrivia things that we're going to do in the course, just so you know what the rules are.

现在，让我用大约五分钟的边角料时间，来说说本门课的基本信息，也就是我们需要在课上做的事儿，好让你们了解一下规则。