The building is a symbol,as is the act of destroying it. Symbols are given power by people. Alone, a symbol is meaningless, but with enough people, blowing up a building can change the world.
那个建筑只是个象征,炸毁它的行为也一样。象征的力量是人民赋予的,没有人民,象征也就失去了意义,有了足够的人民附和,炸毁那座建筑就能改变这个世界。