中国古代四大发明中英文版剖析VIP免费

The Four Great Inventions of ancient ChinaPapermaking Printing GunpowderCompass 1 、 Papermaking When the paper appeared? What is to be made of? First paper appeared at Xi'an in the Western Han Dynasty, and it made by oakum . In 1986, a tomb in Tianshui of Gansu Province unearthed a paper map. According 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。 Papermaking When it appeared that today's paper experience ? Who invented it? In Eastern Han Dynasty, Cai Lun summarized the experience, improved paper making, so this paper is also known as "Marquis Cai's 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 Papermaking papermaking 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 、 Printing Printing How is the printing generated? The earliest books are copied by hand, but then it is also time-consuming and error-prone. Therefore ， printing generated . 印刷术是怎么样产生的？ 最早的书籍是用手来抄写的，但是这样既费时费力也容易出错。因此就产生的印刷术。 Most original printing - rubbing method. In 4th century AD, peopl...