大学英语自学教程 上册 un08

[04:11.48]Ten years ago,a satellite was capable of receiving and transmitting
[04:14.71]十年前，一个卫星能够同时接收和传送
[04:17.93]more than 33,000 telephone conversations simultaneously.
[04:21.36]33000多对通话。
[04:24.78]Now a single satellite is able to transmit over 100,000 conversations
[04:29.35]现在只要一个卫星就能传送100000多对通话
[04:33.92]as well as several hundred television channels--all at the same time.
[04:37.64]以及数百条电视频道——这一切都是同时进行的。
[04:41.36]Telecommunication can make information
[04:43.89]电信能使人迅速和便捷地
[04:46.41]from around the world available to use quickly and easily,
[04:49.54]利用从世界和地来的信息，
[04:52.68]but some people worry that this may be a risk to our privacy.
[04:56.01]不过有些人担心这会危及我们的隐私。
[04:59.34]If personal information is stored in computers,
[05:02.21]如果计算机中存有私人的信息，
[05:05.08]then it maybe easily transmitted via satellite
[05:07.72]那么只要有人能付服务费，
[05:10.36] to anyone who can pay for the service.
[05:12.84]就可能通过卫星所它传送给这个人。
[05:15.32]Another worry is that telecommunication systems
[05:18.35]人们的另一个担心是电信系统
[05:21.38]may isolate people from each other.
[05:23.72]可能使用彼此不再来往。
[05:26.06]When people are able to shop from their homes,
[05:28.74]当人们在家里就能购物，
[05:31.42]do their banking without leaving the house,
[05:33.74]不出门就能往银行里存钱，
[05:36.07]watch any movie they want on their television,as well as
[05:38.90]在电视上就能看想看的电影，
[05:41.73] get any information they need,
[05:43.92]他们也能得到所需要的任何信息，
[05:46.10]then there will not be as much contact between people.
[05:49.34]那么人们之间的接触就 不会那么多了。
[05:52.57]It is important to realize that the same technology that helps us may also harm us.
[05:56.90]重要的是要能认识到，同一技术既能帮人，也能害人。
[06:01.22]We can prevent this from happening by carefully controlling the new technology.
[06:05.00]我们应该认真控制新技术，防止害人的事情发生。
[06:08.77]As one telecommunication expert says,
[06:11.55]正如一位电信专家说的那样，
[06:14.33]"We must remember that technology alone is not the answer
[06:17.67]“我们必须记住，技术本身不是解决的办法。
[06:21.00]...It is the intelligent application of technology that will lead us to success."
[06:25.02]、、、、、、明智地利用技术才会使我们成功。”
[06:29.04]Text B
[06:30.48]课文B
[06:31.92]What People Don't Know about Air.
[06:33.89]关于空气人们还需要了解些什么
[06:35.86]The air around us is important to everyone.
[06:37.99]我们周围的空气对每个人都是至关重要的。
[06:40.12]Without air, we could not exist.
[06:42.46]没有空气 我们就不能生存。
[06:44.79]Everyone understands that.
[06:46.41]每个人都懂得这一点。
[06:48.03]But air is necessary in many other ways--
[06:50.16]但是空气在许多其它方面也是人所必需的——
[06:52.29]ways that are not always so obvious or widely know.
[06:54.82]这些方面并不是明显和广为人知。
[06:57.36]For example,if we did not have air,there would be no sound.
[07:00.58]比如说，假如我们没有空气，就不会有声音。
[07:03.81]Sound travels through air.Where there is no air,there is no sound.
[07:07.35]声音通过空气传播，没有空气的地方，也就没有声音。
[07:10.89]Without air,there would be no fire.
[07:13.07]假如没有空气，就不会有火。
[07:15.25]There would be no cars or trucks,since motors need air in order to work.
[07:18.64]因为发动机需要空气才能工作，所以也不会有轿车或卡车。
[07:22.02]Without air there would be no wind or clouds.
[07:24.45]没有空气不会有风或云。
[07:26.88]There would be no weather,as we know it.
[07:28.81]正如我们所知，也没有天气。
[07:30.74]The night time would be very cold and the days very hot.
[07:33.47]夜间会很冷，白天会很热。
[07:36.20]We would be forced to seek shelter from the sun,
[07:38.33]我们将被迫寻找地主地方以遮蔽太阳,
[07:40.46]as there would be no atmosphere to protect us from the sun's deadly rays.
[07:43.49]因为没有大气保护我们不受致命的太阳光线的照射.
[07:46.52]The atmosphere is all the air surrounding the earth.
[07:48.79]大气指的是包围着地球的空气.
[07:51.07]Atmospheric pressure is the weight of all that air