时间:2019-01-11 作者:英语课 分类:VOA慢速英语2009年(七)月


英语课

This is the VOA Special English Development Report.


The earliest process of making paper was done almost five thousand years ago in Egypt and the Nile Valley. In those days, paper was made from strips 1 of the papyrus 2 plant.


Modern paper-making began in China about two thousand years ago. This process produced paper from cloth, straw, wood or the bark of trees. The raw materials are struck over and over until they become loose. Then they are mixed with water.


After the water has been removed, the flat, thin form remaining is permitted to dry. This becomes a sheet of paper.
 
Paper makes its way through the supercalendar at the NewPage paper mill 3 in Escanaba, Michigan.


Large machines started to be used for making paper near the end of the sixteenth century. Today, paper-making is a big business. But it is still possible to make paper by hand, since the steps are the same as using big machines.


You should choose paper with small amounts of printing. Old envelopes are good for this reason. Colored paper also can be used, as well as small amounts of newspaper. Small pieces of rags or cloth can be added. These should be cut into pieces about five centimeters by five centimeters.


Everything is placed in a container, covered with water and brought to a boil. It is mixed for about two hours with some common chemicals and then allowed to cool. Then it is left until most of the water dries up. The substance left, called pulp 4, can be stored until you are ready to make paper.
 
Liquified cat-tail plants are filtered 5 through a screen to make a sheet of paper.


When you are ready, the pulp is mixed with water again. Then the pulp is poured into a mold 6. The mold is made of small squares of wire that hold the shape and thickness of the paper. To help dry the paper, the mold lets the water flow through the small wire squares.


After several more drying steps, the paper is carefully lifted back from the mold. It is now strong enough to be touched.


The paper is smoothed and pressed to remove trapped air. You can use a common electric iron used for pressing clothes.


There are many other technologies for people making paper using small machines.


Internet users 7 can do a search and find directions for making homemade paper. You can also order information about making paper from the group EnterpriseWorks/VITA. Its Web site is enterpriseworks.org.


And that's the VOA Special English Development Report. Transcripts 8, MP3s and podcasts of our reports are at voaspecialenglish.com. You can also follow us at twitter.com/voalearnenglish. I'm Steve Ember.



n.古以纸草制成之纸
  • The Egyptians wrote on papyrus.埃及人书写用薄草纸。
  • Since papyrus dries up and crumble,very few documents of ancient Egypt have survived.因草片会干裂成粉末所以古埃及的文件很少保存下来。
n.磨坊,碾磨机;制造厂,工厂;vt.磨,碾
  • The rice mill was wrecked by the enemy bombing.碾米厂遭到了敌机的轰炸。
  • The farmer took his grain to the mill.这个农民把谷子送到磨房。
n.果肉,纸浆;v.化成纸浆,除去...果肉,制成纸浆
  • The pulp of this watermelon is too spongy.这西瓜瓤儿太肉了。
  • The company manufactures pulp and paper products.这个公司制造纸浆和纸产品。
n.模子,模型,铸模;vt.造型,浇涛
  • Too often we try to mold our children into something they do not wish to be.我们常常试图把孩子塑造成他们自己不想成为的样子。
  • Try to compact the sand into the mold.设法把这沙土堆积到模子里。
用户,使用者( user的名词复数 )
  • The new software will prove a boon to Internet users. 这种新软件将会对互联网用户大有益处。
  • Ramps should be provided for wheelchair users. 应该给轮椅使用者提供坡道。
n.抄本( transcript的名词复数 );转写本;文字本;副本
  • Like mRNA, both tRNA and rRNA are transcripts of chromosomal DNA. tRNA及rRNA同mRNA一样,都是染色体DNA的转录产物。 来自辞典例句
  • You can't take the transfer students'exam without your transcripts. 没有成绩证明书,你就不能参加转学考试。 来自辞典例句
学英语单词
accelerating chamber
adipocerated
adjustable air capacitor
adoptive mothers
aebs
aerodynamic(al) drag
ambasilide
Ansuman
aortic insufficiency,aortic incompetence
Aponomma
artifices
barbella compressiramea
binary fission
Blumea membranacea
book block production machine
Boucbon's method
burchett
Capelle aan den IJssel
climatogram
coin metal
congenital astigmatism
continuing operating value
Cuntis
dawamats
diffracto-gauge
dorgis
down loading
drift velocity
excess bank reserve
expandable fund
federal air surgeon
fibre drawing
first-aid outfit
fluorspar
gamma transformation
glutamate dehydrogenase
grumble
hard palates
HHV-6
hidden-knowledge model
high quality products
homocapsaicin
horizontal moment
iterable
Kauaians
kino
kopparberg
lateral malleolus rete
Letter from America
lobaria pseudopulmonaria
manakin
Mansel
metallopolymer
metical
MINDO
nastia
negative capacitance amplifier
niqabi
nordwand
overlength fibre
pallet arbor
palmar fascia
pembina
petty expenditures
phymata
polysulfur nitride
postdetection
propetide
propyl bromide
PSVT
pulut
quasi-divisor
quasi-linear model
quicumque vult
replacement vein
requirement of exchange
Rhapis multifida
sawahs
segment pages
semisoft
sense of proportion
simple reaction
smoke
snowblading
stipulated price
stitch in time
stochastic context-free grammar
stod
straining screw
strict standard
Taraxacum staticifolium
telegraph radio
theory of liability
three-dimensional data radar
to allow sb sth
trichosperma triramiferum
Tropiometridae
tween deck frame
undersupports
variable wide pulse
where the hen scratches
Yonggyo-ri