四川新闻网首页
四川 | 原创| 国内| 国际| 娱乐| 体育| 女性| 图片| 太阳鸟时评| 市州联播| 财经| 汽车| 房产| 旅游| 居家| 教育| 法制| 健康| 食品| 天府新区| 慢耍四川
您当前的位置:四川新闻  >  本网原创

濮阳市去除黑眼圈多少钱时空信息驻马店市做永久脱毛多少钱

2019年10月19日 11:24:09
来源:四川新闻网
乐视频道

开封市开内眼角的费用Darren, I do love these museum collections when you come behind the scenes and you suddenly feel that you are surrounded by treasures. And its amazing to think that there are new discoveries to be made in here as well.达伦,我真的很喜爱这些物馆收藏,当你来到幕后时,突然感觉自己被财宝包围着。一想到在这里将会有新的发现,也会让人觉得不可思议。Thats right in a way. There are almost too many specimens for the number of experts out there. There is always new stuff to find in collections. You arent necessary to go out to a field and look for dinosaurs. You can just rummage through museum floors. You will find something new.在某种程度上,这是对的。对于众多在外探索的专家而言,标本的数量相对有限。在收集的标本上总会有新发现。你没有必要去野外的遗址寻找恐龙。只要在物馆的地板上仔细翻阅,就会有新的发现。Recently Darren and a colleague did exactly that. They came across a bone which had been lying on a museum shelf since Victorian times. It may look unremarkable but with several unique features, it didnt fit with anything which had been found before. And it was enough for them to describe a new species.最近达伦和一位同事的确这样做了。他们碰到一块骨化石,它自维多利亚时代起就一直躺在物馆的架子上。它看起来不显眼,但却有几处独一无二的特征,这与之前发现的任何恐龙并不契合。而且这足以让他们来描述一个新物种。About 50 new species of dinosaurs named every year. About 90% of all named dinosaurs have been named since about 1990. If you were to generate a discovery curve of dinosaurs overtime, you would have a curve that shaped like this. And we are currently on the steep upward curve of the graph.每年大概会给50个新物种命名。自上世纪90年代年起,几乎90%的恐龙均被命名。如果你发现的新恐龙来自于更早的时代,那么形状应该是这样的。目前我们的图表是陡峭的上升的曲线。Why do you think there is such a craze for naming new dinosaurs at the moment?你认为在那时为什么会出现给恐龙命名的热潮?Regions of the world have been explored more. They havent been really looked at much beforehand. So places like southern South America, much of the central Asia, parts of Africa and Australia, more and more people are going out to those places, finding new dinosaurs and bringing them back.在世界范围内已经进行探索了许多。他们预先并没有太多依据可以参照。因此在南美南部地区,大多数中亚地区,部分非洲及澳洲地区,越来越多的人来到这些地方,寻找新的恐龙并带回去。原文译文属!201209/199124郑州/在哪治疗瘢痕疙瘩An ocean is the last place yoursquo;d expect to find a freshwater lake. As strange as it may seem, the Arctic Ocean is home to a lake roughly twice the size of Lake Victoria, one of the largest freshwater lakes in the world. This arctic lake is located in the Beaufort Gyre, an area near northwestern Canada where the water circulates in a clockwise pattern. Normally, as rivers empty into an ocean, fresh water mixes with the salty ocean water. Over the last decade, scientists have discovered that arctic river water and melting sea ice have pooled with little mixing. The growing pond isnrsquo;t entirely salt free, but its size and stability have scientists worried.海洋是能找到淡水湖的最后的地方。看起来似乎很奇怪,北冰洋中的湖泊,其大小是世界上最大的淡水湖泊之一;维多利亚湖;的两倍。这个北极湖位于加拿大西北部附近的Beaufort Gyre,那里的水按顺时针模式循环。通常情况下,河流流入海洋,淡水与咸海水混合。在过去十年里,科学家们已经发现,北极的河水和融化的海冰只有少许融合。日益增长的池塘并非完全无盐,但其规模和稳定性令科学家们担心。201202/170044河南省华山整形医院光子脱毛手术多少钱

周口市去粉刺多少钱登封市额头除皱多少钱Mining asteroids小行星采矿Going platinum小行星采矿——淘铂去Mining metals from asteroids seems a bonkers idea. But could it work?小行星采矿这想法听似疯狂,但行得通吗?CAN reality trump art? That was the question hovering over the launch on April 24th, at the Museum of Flight in Seattle, of a plan by a firm called Planetary Resources to mine metals from asteroids and bring them back to Earth.4月24日,行星资源公司(Planetary Resources)在西雅图的航天物馆(Museum of Flight)启动了一项计划——在小行星上采矿并将矿物带回地球。对这项计划,人们一直都在疑惑:现实能否战胜艺术? It sounds like the plot of a film by James Cameron—and, appropriately, Mr Cameron is indeed one of the company’s backers. The team behind the firm, however, claim they are not joking. The company’s founders are Peter Diamandis, instigator of the X Prize, awarded in 2004 to Paul Allen and Burt Rutan for the first private space flight, and Eric Anderson, another of whose companies, Space Adventures, has aly shot seven tourists into orbit. Larry Page and Eric Schmidt, respectively the chief executive and the chairman of Google, are also involved. So, too, is Charles Symonyi, the engineer who oversaw the creation of Microsoft’s Office software (and who has been into space twice courtesy of Mr Anderson’s firm). With a cast-list like that, it is at least polite to take them seriously.这听着就像詹姆斯?卡梅隆的电影中的情节——恰好,詹姆斯?卡梅隆实际上就是这家公司的赞助人之一。但是公司背后的团队宣称小行星采矿这事可不是在开玩笑。行星资源公司的创始人是X奖(2004年Paul Alle和Burt Rutan因首次实现私人太空飞行而获颁此奖)发起者Peter Diamandis和拥有太空探险公司(Space Adventures)(已将七位游客送上太空)的Eric Anderson。GOOGLE的总经理Larry Page和董事长 Eric Schmidt也参与其中,曾负责监督开发微软办公软件的工程师Charles Symonyi同样是其中一分子(通过Eric Anderson的公司,他也上过太空两次)。阵容如此强大,出于礼貌至少也该重视这个想法。As pies in the sky go, some asteroids do look pretty tasty. A lot are unconsolidated piles of rubble left over from the beginning of the solar system. Many, though, are pieces of small planets that bashed into each other over the past few billion years. These, in particular, will be high on Planetary Resources’ shopping list because the planet-forming processes of mineral-melting and subsequent stratification into core, mantle and crust will have sorted their contents in ways that can concentrate valuable materials into exploitable ores. On Earth, for example, platinum and its allied elements, though rare at the surface, are reckoned more common in the planet’s metal-rich core. The same was probably true of the planets shattered to make asteroids. Indeed, the discovery of a layer of iridium-rich rock (iridium being one of platinum’s relatives) was the first sign geologists found of the asteroid impact that is believed to have killed the dinosaurs.这想法虽不切实际,但有些小行星看来确实很诱人。它们许多是由太阳系诞生时遗留下来的碎石堆成的,结构松散;但仍有很多是过去几十亿年里小行星相互碰撞产生的碎片。特别是后者将被行星资源公司优先列在其采矿清单上。因为在行星诞生时,矿物熔化之后会层化为地核、地幔、地壳;这个过程将使其中物质分门别类,令有价值的矿物浓缩成可供开采的矿石。例如在地球上,铂和铂系元素在地表上虽然罕见,但人们认为在富含金属的地核里却是较为常见的。对于那些相互碰撞后其碎片形成小行星的行星而言,情况可能同样如此。实际上,地质学家们提出小行星曾撞击地球的第一个据就是发现了富含铱的岩层(铱是铂的同族元素之一)。人们认为恐龙就是因小行星撞击地球而灭绝的。Most asteroids dwell between the orbits of Mars and Jupiter. But enough of them, known as near-Earth asteroids, or NEAs, come within interplanetary spitting distance of humanity for it to be worth investigating them as sources of minerals—if, of course, that can be done economically.大部分的小行星都位于火星和木星的轨道之间。但近地小行星(即NEAS)也不少,它们距离地球很近,值得勘探。当然,费用要划得来才行。First catch your hare勿谋之过早The first thing is to locate a likely prospect. At the moment, about 9,000 NEAs are known, most of them courtesy of ground-based programmes looking for bodies that might one day hit Earth. That catalogue is a good start, but Planetary Resources plans to go further. In 2014 it intends to launch, at a cost of a few million dollars, a set of small space telescopes whose purpose will be to seek out asteroids which are easy to get to and whose orbits return them to the vicinity of Earth often enough for the accumulated spoils of a mining operation to be downloaded at frequent intervals.首先,要找到一个可能有矿藏的小行星。目前已探明的近地小行星约有9000颗,其中大部分是地面计划在寻找可能撞击地球的天体时探测到的。从这个范围开始寻找是很好,但行星资源公司却有更远大的计划。该公司打算在2014年耗资数百万美元发射一组小型太空望远镜,用于寻找容易到达的、能经常回到地球附近的小行星,以便常将所采矿物送回地球。That bit should not be too difficult. But the next phase will be tougher. In just over a decade, when a set of suitable targets has been identified, the firm plans to send a second wave of spacecraft out to take a closer look at what has been found. This is a significantly bigger challenge than getting a few telescopes into orbit. It is still, though, conceivable using existing technology. It is after this that the handwaving really starts.这一步应该不会太难,但下一步就难度更大了。当该公司发现了一组适合采矿的小行星时,便计划要在短短十年多一点的时间内发送第二批宇宙飞船仔细研究一下这些小行星。这个挑战可比向太空中发射几个望远镜要艰巨得多。不过,利用现有的技术仍是可以实现的。在这之后,纸上谈兵才真正开始。Broadly, there are two ways to get the goodies back to Earth. The first is to attempt to mine a large NEA in its existing orbit, dropping off a payload every time it passes by. That is the reason for the search for asteroids with appropriate orbits. This approach will, however, require intelligent robots which can work by themselves for years, digging and processing the desirable material. The other way of doing things is for the company to retrieve smaller asteroids, put them into orbit around Earth or the moon, and then dissect them at its leisure. But that limits the value of the haul and risks a catastrophic impact if something goes wrong while the asteroid is being manoeuvred.要将所采矿物运回地球大致有两种方法。其一是在不改变其轨道的情况下于一颗较大的小行星上采矿,在这颗小行星每次接近地球时卸下所采矿物。这就是为何要寻找轨道合适的小行星的原因。不过,此法需要能独立工作数年的智能机器人来开采并加工有价值的矿物。其二是行星资源公司改变较小的小行星的运行轨道,将其安置在环绕地球或月球的轨道上,再在有空时仔细研究之。但那将减少每次采矿的量,且要承担移动小行星时出现问题而带来灾难性后果的风险。Either way, the expense involved promises to be out of this world. A recent feasibility study for the Keck Institute for Space Studies reckoned that the retrieval of a single 500-tonne asteroid to the moon would cost more than .5 billion. Earlier research suggested that, to have any chance of success, an asteroid-mining venture would need to be capitalised to the tune of 0 billion. Moreover, a host of new technologies will be required, including more-powerful solar panels, electric-ion engines, extraterrestrial mining equipment and robotic refineries.不论哪种方法,所需费用都一定是天价。最近,克柯太空研究所(Keck Institute for Space Studies)进行的一项可行性分析认为,将一颗重量为500公吨的小行星移到月球附近所耗资金将超过二十五亿美元。较早前的研究指出,必须投资一千亿美元才有可能实现小行星采矿。而且,还需要大量新技术,包括功率更大的太阳能电池板、电子离子引擎、太空采矿设备和自动冶炼厂。All of which can, no doubt, be done if enough money and ingenuity are applied to the project. But the real doubt over this sort of enterprise is not the supply, but the demand. Platinum, iridium and the rest are expensive precisely because they are rare. Make them common, by digging them out of the heart of a shattered planet, and they will become cheap. The most important members of the team, then, may not be the entrepreneurs and venture capitalists who put up the drive and the money, nor the engineers who build the hardware that makes it all possible, but the economists who try to work out the effect on the price of platinum when a mountain of the stuff arrives from outer space.当然,若为这个项目投入足够的资金和人才,以上种种都能实现。但对于这种工程浩大的项目,人们真正质疑的并非是否有人能提供这种务,而是有没有这种需求。正因为稀有,铂、铱等矿物才价格不菲。若这些矿物能在一个由碎片构成的行星的地核中被开采到,它们就成了普通金属,价格也会变得便宜。所以,这个团队里最重要的成员可能不是推动这项事业并参与投资的企业家和风险投资人,也不是设计实现这一目的的硬件工程师;而是当大量的铂从天外而来时,那些试图算出其对铂价冲击的经济学家。201205/183343郑州哪里整容好Reason you are gonna go to mercury as a travel destination would be this night sight view because its gonna be highly unique in the solar system.你要把水星作为一个旅游目的地的原因就是夜间的景色,因为它在太阳系里是独一无二的。You have sodium that atoms are streaming off and giving off to see a lot white.你有钠原子正在发散而且散发很多白色的光。So you could almost look like you are standing in a donut of sodium emission.因此你会看上去像站在钠排放的面包圈里。With the sunrise three months away, you have plenty of time to sit back and take in the view, frame in a hallow of ember light.当太阳光照离开3个月,你就有足够的时间坐下来,欣赏美景,好像在一个光的中心。In some sets, you can get a very nice light show and now people go to Canada to look at the northern whites all the time and so that would be a reason to go to mercury.在一些地方,你就会看到非常不错的灯光秀,而现在人们去加拿大看光秀,所以这也是一个到水星去的不错理由。Now the night out then head into the light.现在晚上然后一头进入了光的世界。But when you are this close to a stellar-wrote history, make sure you pack plenty of sun scream.但是当你这进入星星的历史,确保你已经对太阳光做好准备。If you want a suntan, you cannot beat the dusty sands of mercury. 如果你想要晒黑,你就不能打掉水星满是灰尘的沙子。Stretch out on the ground here and the sun crackles and fizzes right above you, appearing almost three times bigger in the sky and seven times as hot.在这里的地面伸展自己让上面的太阳直接照射你,天空近三倍大的太阳而且是七倍热量。注:听力文本来源于普特201203/173921郑州毛发种植价格

分页 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

返回
顶部