高中英语人教版高二下02

[04:22.22]如果有必要就改变人造卫星的方向.
[04:25.80]Satellites for broadcasting
[04:27.87]人造卫星为广播
[04:29.95]are used to send radio
[04:34.10]and TV programmes from one part of the world to another.
[04:37.22]通常把无线电通信和电视节目从世界的一边发送到另一边.
[04:40.35]Most of these satellites do not change their positions
[04:43.38]大部分的人造卫星都没有改变它们的安置.
[04:46.41]They remain above the same place on the earth
[04:52.05]and travel round it in a very high circle.
[04:54.87]它们在地球上保持同样的高度并绕着地球快速圈动。
[04:57.69]In this way,they are able to connect broadcasting stations
[05:01.11]就是这样，它们才能连接得到电台
[05:04.54]which are a long distance from each other.
[05:06.96]才能在远离内接收到彼此的信息。
[05:09.39]Signals travel at the speed of light.
[05:12.12]信号以光的速度传播。
[05:14.85]They reach the satellite and return to the earth in less than a second.
[05:18.79]它们抵达人造卫星再返回地球所用的时间不用一秒钟。
[05:22.72]Weather satellites send information and photos of weather conditions
[05:26.40]天气卫星发射有关气象的信息和图片
[05:30.08]to weather stations on the earth.
[05:32.26]给地球上的气象台。
[05:34.45]It is therefore possible to say not only what the weather is like at present,
[05:38.52]因此，卫星不仅有可能报告当前的天气情况，
[05:42.60]but also what is likely to happen in the next day or two.
[05:46.38]而且还能预报未来一两天内天气可能要发生的情况。
[05:50.17]This is very useful when there is a hurricane in an area,
[05:53.55]这是非常有用的，当某个地区发生飓风，
[05:56.94]as it is possible to see the path of the hurricane in the satellite pictures.
[06:00.96]人们就可以在卫星图片上看到飓风的一部分。
[06:04.98]Ships and planes can be warned
[06:10.16]so that they can keep out of the path of the hurricane.
[06:13.03]船和飞机就会被提醒，那么它们就会远离飓风来临的轨道。
[06:15.90]Lesson 55 1 Reading comprehension
[06:21.79]第55课 1 阅读理解
[06:27.68]SATELLITES (2)
[06:29.81]人造卫星（2）
[06:31.94]In 1964 a group of 17 countries
[06:34.97]在1964年，由17个国家组成的一个团体
[06:38.00]set up an organization for sending telephone signals by satellite.
[06:41.38]用卫星建立了一个发送电话信号的的组织。
[06:44.77]Their first satellite was called Early Bird.
[06:47.34]他们把第一个人造卫星叫做
[06:49.91]Today there are more than 100 nations in this group
[06:52.84]今天这个团体的成员已经超过100个国家
[06:55.76]and dozens of satellites have been put into space.
[06:58.35]并且也有很多人造卫星发射到太空中。
[07:00.94]You can telephone somebody on the other side of the world
[07:03.72]你可以打电话给地球的另一半的人
[07:06.50]with the help of a satellite.
[07:08.88]通过人造卫星。
[07:11.26]Satellites are used more and more
[07:15.62]to take photos of the earth and to produce maps.
[07:18.40]人造卫星越来越广泛的运用到地球照相和制作地图。
[07:21.18]Special cameras can produce pictures
[07:25.73]showing where different metals can be found.
[07:27.91]在特殊照相机照出来的图片上可以发现不同的金属.
[07:30.09]They can tell the difference between health plants
[07:35.05]and plants that are diseased.
[07:36.83]它们可以展示出健康的植物与有病害的植物的区别。
[07:38.61]This is useful for scientists who work in forests and in agriculture.
[07:41.83]这有利于科学家们在森林与农业方面的研究工作。
[07:45.06]There are many research stations on the earth
[07:47.33]在地球上他们有很多研究所
[07:49.60]in which outer space is studied.
[07:51.48]用来学习太空。
[07:53.36]The problem with looking into space from the earth
[07:55.70]问题是从地球上观察太空外层
[07:58.04]is that there is a lot of dust in the earth's air.
[08:00.47]有太多的灰尘在地球上的空气中。
[08:02.90]The dusty air makes it difficult to get a clear picture of space.
[08:05.98]这些灰尘给拍摄清析的图片曾加了难度。
[08:09.06]With space satellites there are no such problems.
[08:11.55]要是用太空中的卫星就没有这样的问题出现。
[08:14.03]They are being used more and more to collect information about space,
[08:17.21]太空卫星越来越被用来收集有关太空的信息，
[08:20.40]to carry out experiments and to send the information back
[08:23.22]来完成它的实验和把信息传回到