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剑桥雅思8Test3阅读Passage1原文翻译 Striking Back at Lightning wit […]


剑桥雅思8Test3阅读Passage1原文翻译 Striking Back at Lightning with Lasers 用激光回击闪电



雅思真题阅读词汇 剑桥雅思8 test 3 passage 1 用激光回击闪电

剑桥雅思8Test3阅读Passage1答案解析 Striking Back at Lightning with Lasers 用激光反击闪电

剑桥雅思8 Test3 Passage1阅读原文翻译


Seldom is the weather more dramatic than when thunderstorms strike. Their electrical fury inflicts death or serious injury on around 500 people each year in the United States alone. As the clouds roll in, a leisurely round of golf can become a terrifying dice with death – out in the open, a lone golfer may be a lightning bolt’s most inviting target. And there is damage to property too. Lightning damage costs American power companies more than $100 million a year.



But researchers in the United States and Japan are planning to hit back. Already in laboratory trials they have tested strategies for neutralising the power of thunderstorms, and this winter they will brave real storms, equipped with an armoury of lasers that they will be pointing towards the heavens to discharge thunderclouds before lightning can strike.



The idea of forcing storm clouds to discharge their lightning on command is not new. In the early 1960s, researchers tried firing rockets trailing wires into thunderclouds to set up an easy discharge path for the huge electric charges that these clouds generate. The technique survives to this day at a test site in Florida run by the University of Florida, with support from the Electrical Power Research Institute (EPRI), based in California. EPRI, which is funded by power companies, is looking at ways to protect the United States’ power grid from lightning strikes. ‘We can cause the lightning to strike where we want it to using rockets, ‘ says Ralph Bernstein, manager of lightning projects at EPRI. The rocket site is providing precise measurements of lightning voltages and allowing engineers to check how electrical equipment bears up.

强迫暴风云按命令释放闪电的想法并不新鲜。在20世纪60年代初期,研究人员试图发射火箭将电线拖入雷云中,从而为这些云产生的巨大电荷建立一条简易的放电路径。在加利福尼亚州电力研究所(EPRI)的支持下,该技术文章来自老烤鸭雅思在佛罗里达大学经营的一个测试点中一直使用到今天。由电力公司资助的EPRI正在研究保护美国电网免受雷击的方法。EPRI闪电项目经理拉尔夫·伯恩斯坦(Ralph Bernstein)说:“我们可以用火箭让闪电击中我们想要的位置”。火箭场可以精确测量闪电电量,并允许工程师检查电气设备的承受能力。

Bad Behaviour 不良行为


But while rockets are fine for research, they cannot provide the protection from lightning strikes that everyone is looking for. The rockets cost around $1, 200 each, can only be fired at a limited frequency and their failure rate is about 40 per cent. And even when they do trigger lightning, things still do not always go according to plan. ‘Lightning is not perfectly well behaved, ‘ says Bernstein. ‘Occasionally, it will take a branch and go someplace it wasn’t supposed to go. ‘



And anyway, who would want to fire streams of rockets in a populated area? ‘What goes up must come down, ‘ points out Jean-Claude Diels of the University of New Mexico. Diels is leading a project, which is backed by EPRI, to try to use lasers to discharge lightning safely – and safety is a basic requirement since no one wants to put themselves or their expensive equipment at risk. With around $500, 000 invested so far, a promising system is just emerging from the laboratory.



The idea began some 20 years ago, when high-powered lasers were revealing their ability to extract electrons out of atoms and create ions. If a laser could generate a line of ionisation in the air all the way up to a storm cloud, this conducting path could be used to guide lightning to Earth, before the electric field becomes strong enough to break down the air in an uncontrollable surge. To stop the laser itself being struck, it would not be pointed straight at the clouds. Instead it would be directed at a mirror, and from there into the sky. The mirror would be protected by placing lightning conductors close by. Ideally, the cloud-zapper (gun)would be cheap enough to be installed around all key power installations, and portable enough to be taken to international sporting events to beam up at brewing storm clouds.


A stumbling block 绊脚石


However, there is still a big stumbling block. The laser is no nifty portable: it’s a monster that takes up a whole room. Diels is trying to cut down the size and says that a laser around the size of a small table is in the offing. He plans to test this more manageable system on live thunderclouds next summer.



Bernstein says that Diels’s system is attracting lots of interest from the power companies. But they have not yet come up with the $5 million that EPRI says will be needed to develop a commercial system, by making the lasers yet smaller and cheaper. ‘I cannot say I have money yet, but I’m working on it, ‘ says Bernstein. He reckons that the forthcoming field tests will be the turning point – and he’s hoping for good news. Bernstein predicts ‘an avalanche of interest and support’ if all goes well. He expects to see cloud-zappers eventually costing $50, 000 to $100, 000 each.

伯恩斯坦说戴尔斯的系统吸引了电力公司的许多兴趣。但是他们还没有提供EPRI所说的开发商业系统所需要的500万美元。这些钱将用于将激光设备变得更小,更便宜。伯恩斯坦说:“我不能说我没有钱,但我正在努力。” 他认为即将进行的现场测试将成为转折点-他希望有个好消息。如果一切顺利的话,伯恩斯坦预计会出现“大量的兴趣和支持”。他希望看到每个云吹弹枪最终只花费5万到10万美元。


Other scientists could also benefit. With a lightning ‘switch’ at their fingertips, materials scientists could find out what happens when mighty currents meet matter. Diels also hopes to see the birth of ‘interactive meteorology’ – not just forecasting the weather but controlling it. ‘If we could discharge clouds, we might affect the weather, ‘ he says.



And perhaps, says Diels, we’ll be able to confront some other meteorological menaces. ‘We think we could prevent hail by inducing lightning, ‘ he says. Thunder, the shock wave that comes from a lightning flash, is thought to be the trigger for the torrential rain that is typical of storms. A laser thunder factory could shake the moisture out of clouds, perhaps preventing the formation of the giant hailstones that threaten crops. With luck, as the storm clouds gather this winter, laser-toting researchers could, for the first time, strike back.


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