东长赛街道一幅画的是东长安街。在北京城里，人们对於街道的称呼与其它城市不大相同，普遍地叫做“胡同”。为什麽会如此呢？技书上说，有这样两条原因。其一，“胡同”一词始用於元代，而其本义是蒙古语“井”的意思。也许这与草原上水少有关系，凡人能居住的地方必须有水， A picture of the East Changsai Street is East Chang An Avenue. In the city of Beijing, people call the streets very different from other cities, commonly called “alleyways.” Why is it so? Technical book said there are two reasons for this. First, the term “alley” was used in the Yuan Dynasty and its original meaning was the Mongolian “well”. Perhaps this little relationship with grassland Sheung Shui, where mortals can live must have water,