Walking is something you can do with others, in the sense that it can be a joint activity,a joint undertaking.

走路是一件你能和他人一起做的事，这是一个共同合作的行为和事件。

耶鲁公开课 - 死亡课程节选

And on the right is showing you what pattern of activity would be in a controlled brain in most view.

在右边，我们看到控制组大脑的大部分视图,能看出其活动的模式。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选