美国有线新闻 CNN 2014-03-23

 There are many theories about what happened to the missing Malaysia Airlines plane but confirmed information is hard to come by. We\'ll tell you what we know today on CNN Student News.

\"It\'s been 13 days since the flight with 239 people aboard vanished over Southeast Asia.  There are 26 countries involved in the search. The area is almost 3 million square miles from eastern Europe to the southern Indian Ocean. It even extends to the pilot\'s house. A flight similarity was there and yesterday Malaysia official said some flies have been deleted from its hard drive.  Investigators are trying to recover those to see if they hold any clues though it could be just another dead end.  US official said the aircraft\'s most likely location is the bottom of the Indian Ocean. 

The big complete area is still enormous. You are still talking an area where the size of the United States but the area they are focused on most today is about the size of Arizona. Remember,  we\'ve talked you about these 2 acres out here, the northern and southern acres. This is along its southern arc and they are specifically focused on this area about 1,400 miles or so away from the west coast of Australia. It is a moving target by the way.  This was bigger yesterday. You put it in a floor now and  it was a little bit further to the west.  But because of the drifting patterns and things like that, they adjusted it with the hours.  This is all based on something from mathematics called B. theory which is basically saying as all your parameter¹ has changed hour to hour, day to day in a search, you would adjust the probability of where you find it and now that the question  had led them to focus most on this area. And one of the reason we know they are focusing on it so far or so hard  right now is this, this airplane. This is the P8 P.  It\'s made by the navy or the navy has them out there. This is the result of 35 billion dollar program. Each plan costs around a quarter billion dollars and many people consider this most effective subhungting plane in the world now because when it looks down at all this water which you and I would look at with our eyes. We could see sunlight glinting off and making it hard for us to see things.  We might see white caps. All sort of things make it visually hard to see something. It uses radar² to scan many, many miles of this.  Thousands in a day to spot even little tiny items, so the fact that this plane, this quarter billion dollar plane has been moved down to search that specific area shows you that the things of probability that it  could be one of more than important search areas has reason substantially.  It doesn\'t mean they\'ll find anything but that means they think they might find debris³ on the surface. But remember, even if you find something on the surface, even all the calculations by NTSB  and everyone else says it should be down there somewhere. If you find something, the bigger challenge lies ahead because this plane vanished over about 200 feet of water. But if you fly into this part of Indian Ocean and you keep going down below the surface. Look what you get. You get the kind of topography that you would get on this surface. A geography of hills and ridges⁴ and valleys and all sorts of places where that pinier that they might search for could be difficult to locate. \"

The family of the missing are in anguish⁵.  They are frustrated⁶ with the lack of search progress.  Some accused the Malaysia government of withholding⁷ information. There\'s some technology that was launched too late to help with the incidents but astronaut  Chris Hedfiled described how it could help in the future.  

\"5 weeks ago, the space station released 28 little tiny satellite cameras that are now orbiting the world. They are about the size of a long skinny shoebox and each of them goes around the world every 90 minutes and they can see things down maybe to about the size of a car. The beauty of those will be, they will take a picture basically every second and  you go 5 miles a second. So, every 5 miles, they\'ll take a picture of the world and continuously stream that information back to us, giving us a look at  the planet like we\'ve never had before.\

1 parameter   

n.参数，参量

参考例句：

• It is the parameter of distribution.这就是分布参数。
• One parameter which always comes into play is the national economy.国民经济是一个经常起作用的参量。

2 radar   

n.雷达，无线电探测器

参考例句：

• They are following the flight of an aircraft by radar.他们正在用雷达追踪一架飞机的飞行。
• Enemy ships were detected on the radar.敌舰的影像已显现在雷达上。

3 debris   

n.瓦砾堆，废墟，碎片

参考例句：

• After the bombing there was a lot of debris everywhere.轰炸之后到处瓦砾成堆。
• Bacteria sticks to food debris in the teeth,causing decay.细菌附着在牙缝中的食物残渣上，导致蛀牙。

4 ridges   

n.脊( ridge的名词复数 )；山脊；脊状突起；大气层的)高压脊

参考例句：

• The path winds along mountain ridges. 峰回路转。
• Perhaps that was the deepest truth in Ridges's nature. 在里奇斯的思想上，这大概可以算是天经地义第一条了。

5 anguish   

n.(尤指心灵上的)极度痛苦，烦恼

参考例句：

• She cried out for anguish at parting.分手时，她由于痛苦而失声大哭。
• The unspeakable anguish wrung his heart.难言的痛苦折磨着他的心。

6 frustrated   

adj.挫败的，失意的，泄气的v.使不成功( frustrate的过去式和过去分词 )；挫败；使受挫折；令人沮丧

参考例句：

• It's very easy to get frustrated in this job. 这个工作很容易令人懊恼。
• The bad weather frustrated all our hopes of going out. 恶劣的天气破坏了我们出行的愿望。 来自《简明英汉词典》

7 withholding   

扣缴税款

参考例句：

• She was accused of withholding information from the police. 她被指控对警方知情不报。
• The judge suspected the witness was withholding information. 法官怀疑见证人在隐瞒情况。