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青岛好的人流医院排名青岛二院私立还是公办Of course, building a train that could当然,制造一列能达到如此速度的列车reach such a speed is quite impossible.几乎是不可能的But we have built something very like the train.但我们已经制造出了类似的仪器At the worlds largest particle accelerator瑞士日内瓦的欧洲核子研究所at CERN in Geneva, Switzerland.坐落着世界上最大的粒子加速器Deep underground, in a circular tunnel 16 miles long,地下深处,长达16英里的环形管道内is a stream of trillions of tiny particles.有一道万亿颗细小微粒所组成的粒子束When the power is turned on, they accelerate from zero to机器启动的瞬间,它们能从静止加速到60,000 miles per hour in a fraction of a second.6万英里的时速Increase the power, and the particles go faster and faster增加动力,这些粒子便能不断加速until theyre whizzing around the tunnel直到粒子流能以每秒1.1万圈的速度at 11,000 times a second, which is almost the speed of light.飞绕管道,这一速度已极近光速But just like the train,但正如虚拟的列车一样they never quite reach that ultimate speed.它们永远不能达到光速They can only get to 99.99% of the limit.只能达到光速的99.99%When that happens,一旦达到这一速度 they, too, start to travel in time.它们也能进行时间旅行We know this because of some extremely我们在一种寿命极短的π介子上short-lived particles called pi-mesons.观察到了时间旅行的过程Ordinarily,通常情况下they disintegrate after just 25 billions of a second.它们会在250亿分之一秒后衰变But when they are accelerated to near light speed,但当其加速到接近光速时they last 30 times longer.寿命变成了原来的30倍These particles are real-life time travelers.这些粒子,是活生生的时间旅行者It really is that simple.其实就是这么简单If we want to travel into the future, we just need to go fast.如果想去未来旅行,我们只需跑快点Really fast.非常快And I think the only way were ever我认为,唯一能实现这个速度的地方likely to do that is by going into space.就是外太空The fastest manned vehicle in history was Apollo 10.阿波罗10号是史上最快的载人航天器It reached 25,000 miles per hour.达到了时速25000英里But to travel in time,但若要实现时间旅行well have to go more than 2,000 times faster.我们还需比这一速度快上2千倍And to do that, wed need a much bigger ship,因此,我们需要一艘更大的飞船a truly enormous machine.一艘巨大的飞船201508/389927青岛孕前检查项目多少钱 栏目简介:《趣味青春英语视频》是外语网络电台的精品节目,通过大讲堂的网络课堂形式,能够帮助英语学习者积累一些英语背景知识,并通过互动的教学形式,帮助有效记忆英语知识。本栏目是学习趣味青春英语的好材料。201512/406387The 1964 good friday earthquake measured 9.2 on the richter scale and took over 130 lives.1964年 发生在受难日的大地震 震级为里氏9.2级 大地震夺走了130条生命The death toll would have been much higher but for the extreme remoteness of the location.幸亏这儿极为偏远 否则造成的伤亡更大You see all the terrain along the coastline there.Its tough-going.你们看看海岸线四周的地形 路很难走啊But I reckon with all of these sort of resources around here,但我想利用这周边所有 这类废弃物better off making some sort of raft and then getting out onto the water itself.Okay.说不定能做个筏 然后把它推下水 好了You should be able to cover more distance and have a better chance of being spotted on the sea.这样子就可以走得更远 而且在海面上更可能被人发现But out there, youll need a sturdy raft.Old beds.Actually, thatll be quite good to lie on for a raft.但要离开这里 就需要一个坚固的筏 旧床板 这东西 用来做筏挺好的All sorts of these old barrels. Look.And these are so buoyant, these things.所有这种旧油桶 看看 这些东西的浮力很大You want to check theyve got both the... both the bungs in and also that theyve not got any holes.你得检查检查 保所有塞子都塞住了 没有任何漏水孔Otherwise, look like that fella.An airtight oil drum will easily support my weight.不然就惨了 瞧这玩意儿够坚固的 一个密封的油桶很容易就能承载我的重量And with a few, I have the beginnings of a substantial raft.有这几个 初步的坚固筏就成形了Its all this work making sure you build a raft close enough to where youre gonna launch it.这些工作都是为了 保这筏离入水的地方够近The last thing you want to do is build a thing, especially when its out of metal,and then not be able to drag it down there.最不想看到的一件事 就是造好这个金属筏之后 却没有办法把它弄到岸边See the tides coming in here, so its probably about right.正好在涨潮 现在时机正合适I want to get this raft built quickly so Im y to launch when the tide turns.我得快点把筏做好 等着开始退潮时我就下水What I want to do is use the barrels to give me all the buoyancy so that keep this up out of the water.我要做的就是 利用这些桶的浮力 让这个床板离开水面201604/440139青岛剖腹产去哪个医院

青岛哪些医院比较出名栏目简介:;Shanghai Live; focuses on big events in the city and major issues around the world, and presents them in a practical and audience-friendly manner to meet the ever-evolving needs of Shanghais English-speaking viewers,both local and expatriate.《直播上海英语电台》集中报道城市大事件以及全球热点话题,并以观众喜闻乐见的方式呈现给大家,从而满足上海本地以及上海海外人士的英语需求。201511/407274青岛盆腔炎 青岛市一院治疗宫颈糜烂多少钱

青岛治疗妇科病哪个医院技术最好Just take a look at the motion of the lava lakes speed up,看看熔岩湖岩浆快速的翻滚吧it wells up from one side of the crater and forms a dark crust as it cools.它在火山口的一边涌出来 冷却后形成暗色的硬壳Then this crust moves across the surface of the lake driven by the churning action of the lava below.岩浆不断的涌动使硬壳在熔岩湖表面移动Finally, the crust sinks back down.最后这个硬壳块又沉下去了this process of molten rock churning away below the surface effects our entire planet on a blobal scale.我们会发现地表以下的熔岩不断的涌动 这个过程影响了地貌But the Earths heat does far more than simply fuel volcanoes.地球热能的作用远远不止为火山提供能源It continually rebuilds the planets surface它持续不断的改造着地球地貌And it created the conditions for life on Earth to begin.并仓创造了地球上生命起源的条件To understand where our planets immense inner heat comes from,要弄明白地球内部的热能是从哪里来的we have to go back four and a half billion years.我们必须从45亿年前This is the time of our planets birth.地球产生开始说起201508/391324 I benefit from high-class competition.高层次的竞争让我受益无穷Ive been dogged by the competition,bested by the competition a couple times.竞争一直追随着我我有过成功But Ive had my licks, too,and weve managed to hold our own.也有过失败 无论怎样 我们都挺了过来To overtake Rockefeller as the richest man in the country,Carnegie cant just be a profitable steel maker.为了取代洛克菲勒的全国首富地位 ;可盈利;对于卡内基是远远不够的Hes got to be the most profitable.他需要是盈利性最强的And for that, he needs an edge.为此 他需要一个突破口He sets his sights on a struggling steel mill outside Pittsburgh.他将目光 投向了匹兹堡外一家努力挣扎的钢厂With plans to make it the largest in his steel making empire.计划将它打造成自己钢铁帝国中最大的Carnegie invests millions retooling the plant to turn out more structural steel than any other mill of its size.卡内基投资数百万美元 重建工厂让它比相同规模的其它工厂 能产出更多结构性钢材The Homestead Steel Works is a true modern marvel.霍姆斯泰德钢厂堪称真正的现代奇迹But it cant operate without man power.但如果没有人力 它就无法运行One of the huge costs in a steel mill is labor.钢厂的一大成本便是劳动力Carnegie knew that to stay profitable.卡内基知道 要保持高利润率He had to keep costs low.成本就必须压到最低And the only way to keep costs low was to reduce wages and increase working hours.压低成本的唯一方式便是降低工资 并提高工作时长To keep profits growing, Carnegie needs to continue cutting costs.Including wages.为了增加利润 卡内基需要不断降低成本 包括削减工资But hes also determined to repair his image.不过他还想要重塑自己的形象Something he cant do in the midst of a labor dispute.如果陷入劳资纠纷 重塑形象就无从谈起So he turns to his chairman to do the dirty work.于是他只有找自己的主席去做脏活201604/438910山东省中医院是不是私立医院青岛新阳光妇产医院在线咨询




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