大学英语自学教程 下册 un06

[04:00.80]这些数字是灰度系统里亮度
[04:03.67]is measured in a range of values.
[04:06.91]由一毓的数值测量.
[04:10.15]One scale ranges from 0 to 15, and another from 0 to 255.
[04:14.72]一个刻度范围是0到15,另一个是0到255.
[04:19.29]The 0 is represented by black. The highest number is white.
[04:22.78]0用黑色表示,最高的数值是白色的,
[04:26.27]The numbers in between represent different shades of gray.
[04:29.65]之间的数字用不同的灰色阴影表示.
[04:33.03]The computer then makes the calculations and converts the numbers into a picture
[04:36.51]然后计算机进行计算,
[04:39.98]that shows an image of the object in question.
[04:42.96]并将数字转换成一幅表明该物体形象的图像.
[04:45.94]It is not yet known whether robots will one day have vision as good as human vision.
[04:49.91]人们不知道是否有一天机器人能具有像人类一样好的视觉.
[04:53.88]Technicians believe they will,but only after years of development.
[04:57.31]技术人员相信它们会的,只是需要多年的开发.
[05:00.75]Engineers working on other advances are designing and experimenting with new types of metal hands
[05:04.93]在其他方面努力取得进展的工程人员正在设计和实验
[05:09.11] and fingers,giving robots a sense of touch.
[05:12.03]新型金属手臂和手指,使机器人具有触觉.
[05:14.96]Other engineers are writing new programs allowing robots to make decisions
[05:18.20]其他工程人员正在编写新的程序使机器人做出这样的决定:
[05:21.44]such as whether to discard defective parts in finished products.
[05:24.68]是否抛弃已完成产品中有缺陷的零件.
[05:27.92]To do this,
[05:29.38]要做到这一点,
[05:30.84]the robot will also have to be capable of identifying those defective parts.
[05:34.71]机器人还必须具有鉴别有缺陷零件的能力.
[05:38.57]These future robots,assembled with a sense of touch
[05:41.46]集触觉,看的能力和做决定能力于一体的
[05:44.35]and the ability to see and make decisions,will have plenty of work to do.
[05:47.92]这些未来机器人将可以做很多工作.
[05:51.50]They can be used to explore for minerals on the ocean floor
[05:54.32]它们可用于洋底探矿
[05:57.15]or in deep areas of mines too dangerous for humans to enter.
[06:00.48]或探测人类进入危险的深层区域的矿物.
[06:03.81]They will work as gas station attendants,
[06:06.08]它们可以做加油站服务人员,
[06:08.35]firemen,housekeepers,and security personnel.
[06:11.13]消防员,管家和安全人员的工作.
[06:13.92]Anyone wanting to understand the industry of the future
[06:19.17]will have to know about robotics.
[06:21.24]任何希望了解未来工业的人必须懂机器人.
[06:23.32]Text B   Predicting Earthquakes
[06:25.84]地震预报
[06:28.36]Can earthquakes be predicted?
[06:30.09]  地震能够预报吗?
[06:31.81]Scientists are working on programs to predict where and when
[06:36.98]an earthquake will occur.
[06:38.75]科学家正致力于研究预报地震何地何时发生的计划.
[06:40.51]They hope to develop an early warning system
[06:42.69]他们希望开发一种早期警报系统,
[06:44.87]that can be used to forecast earthquakes so that lives can be saved.
[06:47.80]用来预报地震,以挽救人们的生命.
[06:50.72]Earthquakes are the most dangerous and deadly of all natural events
[06:53.52]  地震是自然灾难中最危险和最致使的,
[06:56.31]They occur in many parts of the world.
[06:58.23]发生在世界上许多地方.
[07:00.15]Giant earthquakes have been recorded
[07:04.10]in Iran,China,Guatemala,Chile,India,and Alaska.
[07:08.28]伊朗,中国,危地马拉,智利,印度和阿拉斯加都有过大地震的记录.
[07:12.46]Two of the biggest earthquakes that were ever recorded
[07:16.92]took place in China and Alaska.
[07:19.11]有记载的两次最大的地震发生在中国和阿拉斯加.
[07:21.29]These earthquakes measured about 8.5 on the Richter Scale.
[07:24.21]这两次地震经测量约为里氏8.5级.
[07:27.14]The Richter Scale was devised by Charles Richter in 1935,
[07:30.46]里氏震级是1935年查尔斯.里克特发明的,
[07:33.77]and compares the energy level of earthquakes.
[07:36.05]用以比较地震的能量等级.
[07:38.32]An earthquake that measures a 2 on the scale
[07:40.45]里氏震级测出的2级地震可以感觉到,
[07:42.58]can be felt but causes little damage.
[07:44.95]但几乎不会带来破坏;
[07:47.33]One that measures 4.5 on the scale can cause slight damage,