Imagine, you being part of a network where, you're maybe at a sporting event, and you're sitting in rows like this, and somebody asks for a beer, and it gets handed at the aisle.
想象你自己是网络的一部分， 在那里你也许正在参加一个体育盛会， 你像这样坐在队伍里， 有人要啤酒， 啤酒从过道被传递过来。