English四大发明.ppt

The compass predecessor is one of the four inventions of the ancient Chinese SiNa 指南针的前身是中国古代四大发明之一的司南 The invention of the compass is the result of China ancient working people know to the object magnetism in the long-term practice. 指南针的发明是我国古代劳动人民长期实践中认识到物体的磁性的结果。 Because of productive labor, people have found the characteristic of the magnet pointing to direction. Through experiment and research in many ways, invented the Compass at last. 由于生产劳动,人们已经发现了磁铁的指出方向的特点,。通过试验和在许多方面的研究,发明了指南针。 According to ancient records, in the late northern song dynasty in the sea, China has applied the compass. On board 根据古书记载，最晚在北宋时候，我国已经在海船上应用指南针了。 The compass application in ancient sailing 指南针在古代航海中的应用 Now the compass used more widely for example navigation, travel and military, etc 现在指南针的应用越来越广泛例如航海、旅行及军事等 A compass is an important navigation tools, even in GPS will also be used. Electronic compass will replace the old needle type compass or compass compass, because electronic compass all USES solid state element, still can simply and other electronic system interface. 指南针是一个重要的导航工具，甚至在GPS中也会用到。电子指南针将替代旧的针式指南针或罗盘指南针，因为电子指南针全采用固态的元件，还可以简单地和其他电子系统接口。 Although the four great inventions of very old is due to have their presence todays technology which was able to development. Ancient Chinese labor of the wisdom of the people is great. Worth learning. 虽然指南针等四大发明很古老，但正是由于有了他们的出现如今的科技才得以发展。古代中国劳动人民的智慧是伟大的。值得我们学习的。 Typography The typography is one of the most important four inventions in ancient China. 印刷术是最重要的中国古代四大发明之一. The Inventer --Bi Sheng In Sung Dynasty, word worker Bi Sheng (A.D. 1004 —— 1048), Use the clay with viscidity, make into the rectangle cube, carve the single Chinese characters on it, burn it with the fire, form the font. The printing skill is named the typography. 北宋刻字工人毕升在公元1004年至1048年间，用质细且带有粘性的胶泥，做成一个个四方形的长柱体，在上面刻上反写的单字，一个字一个印，放在土窑里用火烧硬，形成活字。这种改进之后的印刷术叫做活板印刷术。 The Invention Of Bi Sheng Typography in Song D