20世纪是人类取得了重大发展的世纪,也是社会发展愈发明显地趋向城市化道路并取得了重要成功的世纪。在21世纪即将来临的时候,人们在为过去的经历和未来的前程而激动的同时,还在思索着一种颇为严肃的问题:我们在20世纪究竟获得了什么,失去了什么;我们在21世纪究竟要求得怎样的发展,在发展中不应再丢掉什么。 The twentieth century marked the century when mankind achieved major development and the century in which social development increasingly became more and more urbanized. At the dawn of the 21st century, while being excited by past experience and future prospects, people are still thinking about a rather serious question: what did we gain in the 20th century and what we lost; What kind of development is demanded in the 21st century and nothing should be lost in development?