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不明飞行物还是雷霆闪电?

时间:2011-01-11 18:32 点击:
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     人们总是觉得当闪电来临时,站在树下是很危险的一件事情,那是因为你很可能被雷击。但雷击也

会以另外的奇妙的方式发生。

     众所周知,在世界上所有的时间中,大约有2000场雷阵雨。而整个雷阵雨来临的过程,在我们自身

的地方不是每一天都能看到。但如果你知道雷阵雨什么时候要来,你就去架设好照相机把这些纪录下来。

     在雷阵雨来得很凶猛时,闪电拥有能在地下挖个9米深的大洞的巨大能力。
    
     有一种很奇特的闪电形式被称为闪电球。1963年一架航班从纽约飞往华盛顿的途中遇到了闪电球。

此时旅客们正在他们的座位上睡觉,突然闪电好像击中了飞机把他们都震醒了。随后,一个几尺高的直径

为20厘米的蓝白色光球出现在驾驶室外面。旅客们看见这个光球移到机翼旁边,然后在移向机尾的厕所处

消失。后来,一些乘客描述,他们吓坏了,还以为是不明飞行物或是幽灵。

    实际上他们看到的是闪电球。这种闪电当是很亮的闪电,通常呈梨状,它盘旋,弹跳或到处移动,最

后在一声巨响中消失。它的速度达到大约每秒钟2米,可持续很短几秒钟到几分钟。现在还不能科学地解

释火球这一现象,我们只知道这一现象确实会发生。

    科学家认为火球相对来说很安全。他们仔细观察了火球的尺寸和速度,发现它散发的热量很少。由于

在观察和研究过程中,一些金属物质不受它的影响,说明了它可能没有磁性。

    没有人知道光球为什么和如何发出的,但是科学家期望有一天他们能解开这个谜底。所以下一次如果你发现天空中的不明飞行物,很有可能是闪电球。

 

译文:UFO or Lightning Bolt?

People think that it is dangerous to stand under a tree during athunderstorm, because of possible lightining strike. But there are alsoother mysterious ways in which lightning can strike.

It is knownthat any given time around the world, there are approximately 2000thunderstorms in progress. With all this activity, it is still notevery day that we see a storm withen our own area. But if you know whena thunderstorm is coming, you could set up a camera to record thelightning.

During a bad thunderstorm, lightning can hit with such force that it can dug a nine metre hole in the ground.


Onestrange form of lightning is called ball lightning. One incident ofball lightning happened in 1963, during a flight from New York toWashington. The passengers of the flight were sleeping in their seats.Suddenly they were jolted awake by a crack of lightning which seemed tostrike the airplane. Then out of pilot's cabin came a glowing sphereabout 20 centimetres in diameter, blue-white in colour, which wasfloating about couple of feet above the floor. As passengers watched,it moved down the aisle and then disappeared towards the toilet at therear of the plane. Later some passengers said that they were terrifiedand thought that it was some kind of UFO or a ghost.

What theyactually saw was ball lightning, which is when a bright light, usuallyspherical or pear-shaped, hovers, bounces or moves about beforedisappearing with a loud bang. Its speed is around 2 metres per secondand it may last from few seconds to several minutes. There is noaccepted scientific explanation for these balls of fire. We only knowthat they do happen.

Scientist believe that fireballs arerelatively safe. They made careful observations of the ball's size andspeed. They also noted that it gave off little heat and was probablynot magnetic because some of the metal objects were not affected duringthe observation and research.

No one knows how and why lightningballs occur, but scientists hope that one day they will unravel thismystry. So next time if you spot a UFO high in the sky, it wouldprobably be a lightning ball.

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