So with apologies for being a bit more boring for twenty minutes, let's do something we'll call formal stuff.

抱歉接下来的二十多钟分可能有点枯燥,我们来做点正经事

耶鲁公开课 - 博弈论课程节选

Now let's go on to another thing that we'll want to be doing here and that I guess is taking a little bit of rhythmic dictation, writing down some simple rhythms.

现在咱们来做另一件事,我觉得咱们得做点节奏的听写,写下一些简单的节奏

耶鲁公开课 - 聆听音乐课程节选