编者按：从5月2日算起，再过245天就要跨入21世纪了。21世纪将是一个什么样子的时代？现在我们很难预测。但有一点是确信无疑的，那就是21世纪将是个知识经济的时代。在这个时代，世界各国的经济发展，将愈来愈取决于科学技术的发展；世界各国综合国力的竞争。将愈来愈表三兄为 Editor’s Note: Starting May 2, another 245 days are about to enter the 21st century. The 21st century will be what kind of era? Now we can hardly predict. But one thing is certain: no doubt, the 21st century will be an era of knowledge economy. In this era, the economic development of all countries in the world will increasingly depend on the development of science and technology and the competition of the comprehensive national strength of all countries in the world. Three brothers will be more and more table