I paced the floor to and fro with heavy strides, as if excited to fury by the observations of the men -- but the noise steadily increased.

VOA: special.2009.02.02

Let me go and put that up-- it'll be tiring but let me go to and fro a bit.

让我回到讲台上记一下,虽然这样很累但是我多走几个来回吧

耶鲁公开课 - 博弈论课程节选