Who Was Leonardo da Vinci 达·芬奇 PARCHMENT AND PAPER
时间：2019-02-13 作者：英语课 分类：名人认知系列 Who Was
PARCHMENT IS MADE FROM THE SKINS OF ANIMALS SUCH AS SHEEP, CALVES 1, OR GOATS. THE SKIN IS DRIED AND TREATED UNTIL IT BECOMES FLAT AND PAPERLIKE.
PARCHMENT IS MUCH STRONGER THAN PAPER. IT IS MORE EXPENSIVE, TOO. THE BEAUTIFUL PRAYER BOOKS AND BIBLES COPIED BY HAND IN THE MIDDLE AGES WERE ON PARCHMENT. PARCHMENT IS RARELY USED TODAY.
PAPER WAS FIRST MADE IN CHINA ALMOST TWO THOUSAND YEARS AGO BY USING BARK FROM THE MULBERRY TREE. (TODAY, THE FINEST PAPER IS MADE FROM CLOTH RAGS.) PAPER WAS MADE BY WETTING AND POUNDING THE MATERIAL UNTIL IT SEPARATED INTO FIBERS 2 OR STRANDS 3. THESE WERE THEN BROKEN DOWN INTO A LIQUIDLIKE SUBSTANCE THAT WAS POURED ONTO A MESH 4 MOLD. AFTER THE SUBSTANCE DRAINED ON THE MOLD, IT COULD BE LIFTED OFF AS A SHEET OF PAPER. IN EUROPE, PAPER WAS INTRODUCED BY THE MOORS 5 OF NORTHERN AFRICA. THE FIRST PAPERMAKING MILL WAS BUILT IN SPAIN AROUND 1150.
- a cow suckling her calves 给小牛吃奶的母牛
- The calves are grazed intensively during their first season. 小牛在生长的第一季里集中喂养。 来自《简明英汉词典》
- Thesolution of collagen-PVA was wet spined with the sodium sulfate as coagulant and collagen-PVA composite fibers were prepared. 在此基础上，以硫酸钠为凝固剂，对胶原-PVA共混溶液进行湿法纺丝，制备了胶原-PVA复合纤维。
- Sympathetic fibers are distributed to all regions of the heart. 交感神经纤维分布于心脏的所有部分。
- Twist a length of rope from strands of hemp. 用几股麻搓成了一段绳子。 来自《简明英汉词典》
- She laced strands into a braid. 她把几股线编织成一根穗带。 来自《简明英汉词典》
- Their characters just don't mesh.他们的性格就是合不来。
- This is the net having half inch mesh.这是有半英寸网眼的网。