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08-A.Telecommunication via Satellite

Published:2013-01-20 16:14 Click:wait for……
08-A.Telecommunication via Satellite At the beginning of the twentieth century, there were four powerful means of transmitting and receiving information over long distances: print, photography, telegraph and telephone. By the middle of the c
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08-A.Telecommunication via Satellite

At the beginning of the twentieth century, there were four powerful means of transmitting and receiving information over long distances: print, photography, telegraph and telephone. By the middle of the century, both radio and television had become established means of transmitting sound and/or pictures. In 1964, the Olympic Games in Tokyo became the first program to be transmitted via satellite.

In order to transmit an event such as the Olympics via satellite, television signals are first changed into radio waves, which are then sent from a station on earth to an orbiting satellite. The satellite receives the radio waves and sends them back to earth, where another station picks them up and changes them back into television signals. Because any form of sound or visual information can be changed into radio waves, satellites are capable of transmitting not only television broadcasts, but telephone calls and printed materials such as books and magazines.
The combination of satellites, which transmit information, computers, which store information, and television, which displays information, will change every home into an education and entertainment center. In theory, every person will have access to an unlimited amount of information.

Another important use of telecommunication satellites was demonstrated in 1974 when the "Teacher in Sky" satellite transmitted educational programs to classes in remote areas of the United States. In 1975, many people in India saw television for the first time as they watched programs about agriculture and health.

The satellite also demonstrated how it could provide help to people living in isolated areas where transportation is difficult. For example, a health worker in an isolated area was able to transmit pictures of a patients wound to a doctor far away. He was then able to follow the doctor's instructions on how to care for the patient.

The most common use of telecommunication satellites, however, has been for transmitting telephone calls. Most of them trave1 40, 000 miles to a satellite and then back to earth. Ten years ago, a satellite was capable of receiving and transmitting more than 3?000 telephone conversations simultaneously. Now a single satellite is able to transmit over 100,000 conversations as well as several hundred television channels - all at the same time.

Telecommunication can make information from around the world available to use quickly and easily, but some people worry that this may be a risk to our privacy. If personal information is stored in computers, then it may be easily transmitted via satellite to anyone who can pay for the service.

Another worry is that telecommunication systems may isolate people from each other. When people are able to shop from their homes, do their banking without leaving the house, watch any movie they want on their television, as well as get any information they need, then there will not be as much contact between people.

It is important to realize that the same technology that helps us may also harm us. We can prevent this from happening by carefully controlling the new technology. As one telecommunication expert says, “We must remember that technology alone is not the answer…It is the intelligent application of technology that will lead us to success.

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telecommunication['telik4`mju:ni'kei54n]n.电信,远距离通信
via['vai4]prep.经由,经过,通过     satellite['s1t4lait]n.卫星,人造卫星
transmit[tr1nz'mit]vt.1.播送,发射;2.传送,传递;3.输送
photography[f4't3gr4fi]n.1.摄影,照相;2.摄影术
telegraph['teligr2:f]n.1.电报机,电报(指通信方式);2(一份)电报;vt.用电报发送;打电报给;vi.打电报
establish[i'st1bli5]vt.1.建立,创办,设立;2.确立,使确认
signal['sign4l]n.信号,暗号;vt./vi.(向...)发信号
orbit['3:bit]vt./vi.绕(...的)轨道运行;n.轨道     visual['vizju4l]a.视觉的,看得见的
capable['keip4bl]a.1.有能力的,有才能的;2.能...的(of)
broadcast['br3:dk2:st]n./vt./vi.广播,播音     computer[k4m'pju:t4]n.计算机,电脑
theory['7i4ri]n.1.理论,原理;2学说
access['1kses]n.1.通道,入口;2.接近(或进入)的机会,享用机会
unlimited[8n'limitid]a.1.无界限的,无边无际的;2.无限制的,无约束的;3.无数的,无限量的
demonstrate['dem4nstreit]vt.1.说明,演示;2.论证,证实;vi.示威游行
educational[`edju:'kei54nl]a.1.教育的,教育方面的;2.有教育意义的
remote[ri'm4ut]a.1.遥远的,偏僻的;2.(可能性)很小的
isolate['ais4leit]vt.使隔离,使孤立;a.孤立的
transportation[`tr1nsp3:'tei54n]n.1.运输;2.运输系统,运输工具
instruction[in'str8k54n]n.1.教学,指导;2.[常pl.]命令,指示,用法说明
conversation[`k3nv4'sei54n]n.谈话,会话
simultaneously[`sim4l'teinj4sli]ad.同时发生地,同时进行地
channel['t51n4l]n.1.频道;2.水道,航道;3.渠道;4.海峡;vt.通过...获得,传送
risk[risk]vt.冒...的危险;n.冒险,风险
privacy['praiv4si]n.1.私事,私生活;2.隐私;3.独处
personal['p4:s4nl]a.1.个人的,私人的;2.亲自的
movie['mu:vi]n.电影     contact['k3nt1kt]n.接触,联系;vt.与...接触,使联系
technology[tek'n3l4d9i]n.工艺,技术     harm[h2:m]n./vt.伤害,损害,危害
expert['eksp4:t]n.专家,能手;a.熟练的,内行的
application[`1pli'kei54n]n.1.申请,申请表;2.应用,实施
be capable of(指人)有某种能力或倾向的
have access to可接近,可进入      lead to导致;通向

 
 
Unit 8  Text A   Telecommunication via Satellite
搭配:
1. At the begging of sth.  在什么的开始/介词词组
2. Change into  转变成/动词词组
3. From…to…  从…到/介词词组
4. Pick up  接收/动词词组
5. Be capable of sth./doing sth.  某人能够胜任某职位;某事有可能做某事/形容词词组
6. In theory  理论上地/副词词组
7. Have access to sth./doing sth.  接触,使用,可接近/动词词组
e.g. You can easily have access to him.  他很好接近。
We have free access to her materials.  我们可以免费使用她的材料。
8. Provide help to people  为人们提供帮助/动词词组
9. Be able to do sth.  能够做某事/形容词词组
10. Follow sb.s instructions on sth.  在什么事上听从某人的意见/动词词组
11. Care for  照顾/动词词组
12. As well as  也/起到连接作用的词组
13. Be a risk to sth./doing sth.  做某事很冒险/名词词组
14. Pay for sth.  为某样物品付款/动词词组
15. Isolate sth./sb. from sth./sb.  市某人/某物与某人或某物隔绝/动词词组
16. Do one's banking  存钱或取钱(银行业务)/动词词组
17. Prevent sth. from sth./doing sth.  阻止某事发生/动词词组
18. Lead sb. to success 引导某人成功;lead to sth./doing sth.  导致/动词词组
语言点:
1. 时态题:By the middle of the century, both radio and television had become established means of transmitting sounds and/or pictures. By the time of +现在时间状语,用一般现在时;by the time of +将来时间状语,用将来完成时;by the time of +过去时间状语,用过去完成时。
2. Printed materials  印刷材料;isolated areas  荒芜的地区
3. Entertain(v.娱乐)-entertained(adj. 娱乐的)-entertainment(n. 娱乐)
4. In 1975, many people in India saw television for the first time as they watched programs about agriculture and health. (因为)
5. Common的最高级the most common
6. 难句:Telecommunication can make information from around the world available to use quickly and easily, but…
make sth. available  sth. 是宾语;available 这个adj.是sth. 的宾语补足语
电信可以使全世界的信息使用起来又便捷又容易。
7. Contact为不可数名词,可以用much来修饰,表示许多联系。
8. 翻译:It is important to realize that the same technology that helps us may also harm us.
意识到一项科技既能帮助我们又会伤害到我们,这很重要。
Unit Eight

1. By the middle of the century, both radio and television had become established means of transmitting sounds and /or pictures.
2. Satellites are capable of transmitting not only television broadcasts, but telephone calls and printed materials such as books and magazines.
3. The satellite also demonstrated how it could provide help to people living in isolated areas where transportation is difficult.
4. Another worry is that telecommunication systems may isolate people from each other.
(Editor:admin)
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