中国古代四大发明中英文版课件

1、The Four Great Inventions of ancient ChinaPapermaking Printing GunpowderCompass 1、PapermakingWhen the paper appeared? What is to be made of? First paper appeared at Xian in the Western Han Dynasty, and it made by oakum . In 1986, a tomb in Tianshui of Gansu Province unearthed a paper map. According

2、to appraisal of some experts ，this piece of paper is a plant fiber paper. 最早的纸出现在西汉时期的西安，是用麻絮来制成的。 1986年，在甘肃省天水的一座古墓中 出土了一幅纸地图。经专家鉴定， 认为西汉时期的纸属于植物纤维纸。PapermakingWhen it appeared that todays paper experience ? Who invented it? In Eastern Han Dynasty, Cai Lun summarized the experience, improved paper

3、making, so this paper is also known as Marquis Cais paper. 如今的造纸经验在什么时候就出现了？由谁发明？ 东汉末年，蔡伦总结了造纸经验，改进了造纸法，所以这种纸又称为“蔡候纸”。What raw materials used in Eastern Han Dynasty papermaking ? What is the process? Raw materials - bark, hemp head, rags, old fishing nets Process - Pulping, paper fishing, drying 东汉时

4、造纸使用什么原料？有什么工序？ 原料树皮、麻头、破布、旧鱼网 工序制浆、捞纸、烘干Papermakingpapermaking propagation 4th century AD, introduced to the Korean, Vietnam. 7th century, introduced to Japan, the Arab region. 12th century, spread to Europe, Africa. 造纸术对外流传 公元4世纪，传入朝鲜、越南。 公元7世纪，传入日本、阿拉伯地区。 公元12世纪，传入欧洲、非洲。2、PrintingPrintingMovable

5、type - Bi Sheng In the 11th century, the Song Dynasty people Bi Sheng invented movable type. This printing method both effort and quickly find errors ，which can also be corrected promptly. 活字印刷术毕升 公元11世纪，宋代人毕升发明了活字印刷术。这种印刷方法既省力又迅速，发现错误还可以及时改正。Later it was also invented a higher quality printing tech

6、nology Wood type - copper type - type of lead 后来人们还发明印刷质量更高的技术 木活字铜活字铅活字Movable type external communication It gradually spread to Korea, Japan and Western countries. 活字印刷术对外传播 陆续传到朝鲜、日本和西方各国。3、CompassWhat inspired people to make the guide tools? Long ago, people discovered that lodestone can absorb

7、 the iron (which is now what we call the magnet). As early as the Warring States period, Chinese ancestors have made Si nan by lodestone to indicate direction. This is the first guide tool. 人们是受到什么启发才制造了指南工具的？ 很早以前，人们发现了能吸铁的天然磁石（即现在我们所说的磁铁）。早在战国时期，中国先民已用天然磁石制成指示方向的司南。这就是最早的指南工具。4、Gunpowder Gunpowder

8、 was invented in China, dating back more than 1000 years. Research began in ancient alchemy . Alchemy was popular for a thousand years, but finally nothing. However, some of the specific methods used in alchemy still has merit, and it shows the original form of the chemical, refining methods like gu

9、npowder. Thus the invention of gunpowder has some chance. 火药是中国人发明的，距今已有1000多年了。火药的研究始于古代炼丹术。炼丹术流行了一千多年，最后还是一无所获。但是，炼丹术所采用的一些具体方法还是有可取之处的，它显示了化学的原始形态，就如火药的炼制方法。因此火药的发明具有一定的偶然性。 Gunpowder consists of saltpeter, sulfur and charcoal powder, so it is also called black powder. 火药是用硝石、硫磺和木炭的粉末混合制成的，所以也叫“黑

10、火药”。 GunpowderGunpowder applications: In the Tang Dynasty, gunpowder began to be used for military. For example, people often use the Rocket in the fire attack. During the Song and Yuan Dynasty (AD 960 - AD 1368), gunpowder is widely used in the military, there has been a lot of gunpowder weapons, such as rockets, handguns, spears, guns and so on. 火药的应用： 唐朝末年，火药开始用于军事。比如在火攻中常使用“火箭”。 宋、元时期(公元960年公元1368年)，军事上广泛应用火药，出现了许多火药武器，主要有火箭、火铳、突火枪、火炮等。 1、What are the four great inventions of our country? Paperma