本报北京1月13日讯(记者董山峰)著名物理学家杨振宁教授今天下午在此间发表演讲时称,21世纪中国科技将突飞猛进,到该世纪中叶,中国将成为世界科技大国。 杨振宁教授所作演讲的题目是《近代科学进入中国的回顾与前瞻》。他演讲的主要内容是:公元1400年前中国科技领先世界;1400-1600年间西方发达国家科技勃兴,中国举步不前;1600-1900年 Beijing, January 13 (Reporter Tung Shan-feng) Well-known physicist Professor Yang Zhenning said in his speech here this afternoon that in the 21st century China's science and technology will make its leap forward by the middle of the century and China will become a world science and technology country. The topic of Professor Yang Zhenning's speech is “The Review and Prospect of Modern Science Entering China.” The main contents of his speech are: China Science and Technology Leading the World by 1400 BC; Western Developed Countries Flourishing in Science and Technology between 1400 and 1600, China Premature; 1600-1900