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
.tc
absolute colcmun temperature
aerated mud
aglianicos
almanc
average man
axial varying pitch
barboni
Beattie James
bed-time
behm
black water fever
camshafteccentric
centre hole reamer
chrome-faced piston ring
Chuna
cicatrice
complex molecule
consumption account
corn powder
cranse-iron
crosswordese
cudgel one's brains
Deslandres
dial peer hunting
dishono(u)red bill
disk machine
dividing mechanism
double semi-trailer road train
down grading
downlong
downplayer
dunera
employee rating
Estradial
find favour with in someone's eyes
fixed-based natural frequency
foist one's company on someone
full bridge
Garden of England
general initiation factor
genus ambloplitess
grass fabric filter
group orbital
in high snuff
IP Security
Knight Commander
Kocs
lift microphone
M.I.NG
magnetic distortion
minutely
multiple spindle drilling machine
narcoanalyst
nominative tender
Pawtucket
personal goals
photofission product
physiological properties of mineral
pneumatolytic metasomatism
pre-placental
precap
purlwise
Radicularia
rafter timbering
rating fraction
rational circle
real-property
rectangular strip
research vessel unit
resection of lower lobe of right lung
rubber flag
ruminate endosperm
Runsten
sadiqs
school boy
seam ravelling
self-limiting reactor
self-modification
semi-simplicial complex
sensation-seekers
sensibilite
set sb thinking
set-time
souris
spatial wave
steady-state temperature
supply lines
supracondylar osteotomy
The matter stands thus.
total actual spending
trichlorophenolate
two-party sequential bargaining experiments
U.P.W.A.
unconfound
unearnable
urfa
user side
weighed into
wingbeat
word separation
world wildlife fund