站在世纪的终点回眸和综览百年来世界的变迁无疑是件很有意义的事。尽量用简短的文字向读者概述这一个世纪的巨变，也是世界史工作者义不容辞的职责。２０世纪是人类历史上最不平凡的一个世纪。它不仅变化最大，而且变化万千。如果从世界通史角度观察，２０世纪有五个方面... Standing at the end of the century Looking back and overview of the changes in the world over the past century is undoubtedly a very meaningful thing. Try to outline to readers the tremendous changes of this century with short texts, which are also the bounden duty of world history workers. The twentieth century is the most extraordinary century in human history. It is not only the most varied, but also changing. If you look at the history of the world, there are five aspects in the 20th century ...