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知识经济是以知识为核心的经济，它直接依赖于知识创新、传播和应用。近年来美国经济的强劲发展势头，及日本经济的相对停滞，关键的原因是美国的知识经济迈入了更高的层次。其主要动力是信息技术革命和商业全球化浪潮。图１为信息技术产业在美国经济增长中的作用示意图。自１
Knowledge economy is knowledge-based economy, which directly depends on knowledge innovation, dissemination and application. In recent years, the strong momentum of the U.S. economy and the relative stagnation of Japan’s economy have been attributed to the fact that the knowledge economy of the United States has entered a higher level. Its main driving force is the wave of information technology revolution and commercial globalization. Figure 1 shows the role of the information technology industry in U.S. economic growth. Since