科学是没有国界的,因此,各国科学家彼此间互相学习和交流最新科学研究成果和治学经验,对于推动科学事业的发展和人类的文明进步有着非常重要的意义。目前,我国科学技术水平较之于发达国家的科技水平是有明显差距的,最近发表的一项对2500名学者的调查表明92%的人认为中国在很多科学领域落后于世界先进水平,并且有相当比例的人认为中国的综合科学 Science has no boundaries. Therefore, it is of great significance for scientists in different countries to learn from each other and exchange the latest achievements in scientific research and the experience of studying in science, so as to promote the development of science and the progress of civilization of mankind. At present, there is a clear gap between the level of science and technology in our country and the level of science and technology in developed countries. A recent survey of 2,500 scholars shows that 92% of people think that China lags behind the world advanced level in many scientific fields and has A considerable proportion of people think that China's comprehensive science