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鹰潭那家医院做人流好

2018年02月19日 20:04:09|来源:国际在线|编辑:豆瓣头条
Don: Time now for another episode of a Moment of Science. Did you know? So Yael, did you know that therersquo;ve been 23 mass extinctions since life begun on earth.唐:又到了我们的科学时刻了。耶尔,你知道吗?自从地球出现以来,她已经历了23次大规模的物种灭绝。Yale: I know therersquo;ve been a few extinctions, Don, but not that many.耶尔:唐,我知道地球确实经历了几次物种灭绝,但没你说的那么多。Don: Yep, many were prehistoric bacteria and other single-cell microorganisms, but in the past 540 million years or so, therersquo;ve been about 5 mass extinctions. Many are marine plants and animals but also off-land organisms. 唐:是的。远古时候,地球上存在着大量的细菌和其它单细胞的微生物,但在过去的5亿4000万年内,地球经历了5次大灭绝,灭绝的大多是海洋植物和海洋动物,但也有一些陆地生物。Yale: I know that the dinosaurs disappeared about 65 million years ago possibly due to a large meteor crushing into earth and block out the sun. But what cause all those other extinctions?耶尔:嗯,我听说恐龙是在大约6千500万年前灭绝的,可能是流星撞击地球之后太阳光被遮挡造成的。其它几次灭绝是什么原因?Don: Thatrsquo;s been a mystery for a long time. But now some scientists think that most mass extinctions have been driven by the rise and fall of sea level. That may sound strange. But consider that millions and millions years ago, a shallow sea covered the entire middle section of North America. That sea grew and shrank back several times. Each time it drained, it caused entire species of sea plants and creatures to die off. The last time it drained was around 65 million years ago when the dinosaurs disappeared.唐:那是一个埋藏许久的谜团。但是,现在的一些科学家认为,是海平面的上升或下降造成了这些大灭绝。这听起来可能有点奇怪。但是,考虑到亿万年前覆盖整个北美大陆中部的只是一层浅海,这片海域几经上升和回落。每次干涸,它都会造成整个海洋植物和动物的消亡。它的最后一次干涸出现在6千500万年前,正是在那个时候,恐龙彻底灭亡了。Yale: OK, I understand that was sea vanishing would kill of the marine life. But did the searsquo;s disappearing also have something to do with the dinosaurs going extinct?耶尔:好吧,我知道了海洋消失的确会使海洋生物灭绝,但是也能使恐龙灭绝吗?Don: Maybe. When the sea disappears, it has big effect on climate. All that water provides heat and moisture. And when the sea drains, the climate becomes drier and colder. So the changing climate may have combine with meteor impact to kill off the dinosaurs.唐:也许是这样的。当海洋消失时,会对气候产生巨大影响。海水可以提供热量和湿气。但是当海洋干涸时,气候会变得干燥和寒冷。因此,气候变化和流星撞击地球可能是恐龙灭绝的元凶。201202/172043What will come up of here in Trainer Pennsylvania will keep these in the air. Its jet fuel.位于宾夕法尼亚的Trainer炼油厂被航天公司收购,发生了这样的变动主要是因为燃油。Delta Airlines has secured 80 percent of its jet fuel needs, cutting out the middle man buying this idle the refinery from ConocoPhillips for 150 million dollars.美国达美航空公司通过子公司收购了康菲集团的这家炼油厂,收购价为1.5亿美元,这样他们80%的燃油需求就有了保障。Delta Airlines is entering the oil refining business.达美航空正在进军石油炼油业务。When we first heard about it two months ago, I said no way in the world.两个月前首次听到这个消息时,我就说过路是人走出来的。Tell me whats happening with Delta and Trainer Refinery.达美航空公司和Trainer炼油厂之间发生了什么。Delta is gonna try something really interesting.达美在尝试的事业真的很有趣。I think they are looking at this same world tired of paying ten dollars or more over the price of crude which is very expensive for jet fuel.我认为他们已经厌倦了购买价格昂贵的燃油,因为燃油的价格比原油高出10美元以上。What Delta has secured is the delivery network for jet fuel rearching through out the north east including its hubs at New Yorks JFK and the Gaudi Airports.达美航空确保了燃油供给网络,这条网络一直延伸至东北部,包括位于纽约的肯尼迪机场和高迪机场。The refinery might cost 150 to 200 million dollars. And from the perspective of the airline like Delta thats less than that what they would pay for a model 777 aircraft.这家炼油厂的收购价为1.5亿至2亿美元。对于达美这样的航空公司来说,这些钱还不够买一架波音777。The state of Pennsylvania added 30 million dollars to the deal for job creation. And Delta plans to spend additional 100 million dollars to upgrade this facility to produce as much jet fuel as possible.宾夕法尼亚州州政府为创造就业机会,资助了3000万美元。此外,达美还将再花1亿美元来升级炼油设备,以求最大限度地生产燃油。Its jet fuel Delta wants. It will trade the gasoline and diesel that comes out here with other refiners for more fuel for its planes.达美的目标是燃油。它还将与其他炼油厂交易,获取更多飞机所需的汽油和柴油。The Trainer facility behind me is an oil refinery. Its an idol.我身后的Trainer就是一家炼油厂。它是这儿的象征性建筑。The fact that an airline would even consider buying an oil refinery underscores a drama unfolding in the north east.事实上,航空公司竟然考虑收购炼油厂,这样戏剧性的事件确实在东北地区拉开了帷幕。Nearly half of the refining capacity on the east coast has either shut down or could shut down later this year.近一半的位于东部海岸线的炼油厂,要么已经关闭,要么会于年内关闭。Buying and turning the Trainer facility back on helps Delta avoid a potential spiking prices and even a shortage which is also a threat to consumers in the north east.达美收购Trainer炼油厂并让它起死回生一是为了避免受燃油价格波动影响,二是为了防止东北地区燃油短缺,造成客户流失。I dont reckon there will be a, you know, a vision of 70s gasoline and rationing but certainly there could be the possibility that might be later this season but sure it is.你也知道,我很难想象再次出现70年代时汽油限量供应的情景,但是在这一季度很有可能会这样。But I think that would even procrastinate until August into the fall.但是我认为也有可能拖延至八月份。Even with gas prices close to four dollars a gallon, some north east refineries are losing up to a million dollars a day.即使每加伦汽油接近4美元,一些东北地区的炼油厂还是在亏本经营,最严重时每天亏损100万美元。Currently they are only equipped to handle imported oil from Europe and North Africa which costs up to 30 dollars more per barrel than the type through oil refineries on the gulf coast use. 目前的条件只允许他们从欧洲和南非进口燃油,每桶油价高达30美元之多,比当地炼油厂生产的油更贵。201205/181105

The force of will make all mistakes necessary to get the right answer.这种意志力量把所有的必要错误变为正确。He was never at the moment of Oh, no, Im not gonna have failure That because of his ego,他从来没有“噢,不,我不会失败的”的这种时刻,因为他的自尊,I dont think it ever occurred to him.我不认为这曾经发生在他身上。Hes not gonna have the failure.他不会有失败。What it matters is that you keep your eyes on the prize.最重要的是你要争取这个奖项。For Einstein that prize is the Nobel.对爱因斯坦来说就贝尔奖。Proceeds he has promised to Mileva and his two sons.他已经答应把所得给米列娃和他的两个儿子。In 1915, hes asked to present his General Theory of Relativity at a prestige forum to the most important German scientists.在1915年,他被要求在最重要的德国科学家的一个权威论坛递交他的广义相对论。Einstein accepts but 8 years of work, his theory still has two major problems.爱因斯坦接受,但8年的工作后,他的理论仍有两个主要问题。Its completely unproven, and the math appears of be flawed.完全有存疑,而且数学方面出现瑕疵。After nearly a decade of work,经过近十年的工作后,Einsteins General Theory of Relativity is still far from finish,爱因斯坦的广义相对论还远未完成,his math is wrong, and without the correct calculation, his theory cant be proven.他的数学也是不对,没有正确的计算,其理论就无法被明。And now he scheduled to deliver a paper to the most prestige scientific gathering in Germany.而现在他计划在最权威科学家门聚集在德国的这一时刻发表这个理论。Prussian Academy, its a very formal place.普鲁士学院,这是一个非常正式的场合。Its a place that knows how distinguish it is, how historically significant its.这是一个能够区分优劣,历史底蕴十足的地方。its reasoning means considered as an attempt by you know,如你所知,其推理方式视为一种试探,some of Germanys leading thinkers to act as if the world were not one it was.一些德国主要的思想家扮演着整个世界都没有这样的如此出色的角色。注:听力文本来源于普特201205/180506

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