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2019年06月19日 11:55:30    日报  参与评论()人

龙岩微创复通那里好博爱医院看多囊好不好费用多少My old toy train is a perfect way of illustrating Einsteins profound question.我以前的玩具火车 最适合用来解释爱因斯坦的深奥问题of what the fixed speed of light meant for the universe.光速恒定对宇宙的意义Einstein started with a simple question:爱因斯坦先从一个简单的问题开始How fast is something like this little train moving?这列小火车的行进速度有多快Well,this is the 1950s and toy trains werent all that good.当时是1950年代 玩具火车的品质并不怎么理想So lets say its traveling at about one mile per hour.就假设行进速度大约每小时1600米吧But change way you look at it from. You get a different answer.但若改变观察点 就会有不同的The earth spins on its axes at around 1,000 miles per hour.地球以大约1600公里的时速绕着地轴旋转So,seen from up here,my train is actually traveling much faster.所以若从这里看 这列火车的速度就快得很多Of course,the earth as a whole is orbiting the sun at 67,000 miles per hour.当然整体而言 地球绕着太阳旋转 且时速为108000公里And even the sun isnt stationary. It is orbiting the center of the milky way.就连太阳也并非静止 而是绕着系的中心旋转And the Milky Way is moving through space,too.而系也在太空中旋转So how fast is the train really moving?那么火车的行进速度究竟有多快?Well,it all depends on way you see it from.完全取决于从哪里观察It could be 1 mile per hour,1,000 miles per hour,60,000 miles per hour.Or many times faster.可能是每小时16公里 每小时16000米 每小时10800公里 甚至快好几倍201601/422153龙岩市第二医院看不育好不好费用多少 Paris was one of the first cities to begin wearing the colours of Belgium in solidarity after the attacks in Brussels. Hundreds of locals gathered in on the square outside the Paris town hall including the city’s major Anne Hidalgo and the Belgium ambassador.布鲁塞尔发生袭击案后,巴黎作为首个城市挂上比利时旗帜声援团结。数百人聚集在巴黎市政厅外的广场,包括巴黎市长伊达戈和比利时大使。Many compared their feelings to those they had experience last year after terrorism hit the French capital.许多人将其同比去年法国首都巴黎遭遇的恐怖主义袭击。For us, Brussels is a bit like a twin city, so it is extremely moving to see this city targeted today by the same attacks Paris encountered a few months ago.对于我们来说,布鲁塞尔像我们的孪生城市,看到这座城市遭遇几个月前巴黎同样的袭击,非常令人感触。We are very sad, we’re maybe more frightened but this does not prevent us from gathering here and overcoming this fear and to continue to live.我们非常悲伤,我们也许更害怕,但这并不能阻止我们聚集在这里克这种恐惧,并继续生活。While shows of solidarity have come from many quarters, the pens of artists have also been at work.从许多方面都表达了人们的团结,艺术家们也在用他们的笔尽一份力。This one image by the celebrated cartoonist Plantu who has aptly conveyed Parisian sympathy.这一形象由著名漫画家普朗蒂绘制,贴切地传达了巴黎的同情。While much loved characters from France and Belgium, Obelix and Tintin , can been seen comforting one another.与此同时,更多来自法国和比利时的有爱形象Obelix和Tintin,表达他们互相安慰。译文属。 /201603/433023Which means the Rover not only has to travel all the way to Mars,这意味着火星车不仅要飞往火星it has to travel还要穿越时间back in time.回到过去This desert,这片沙漠200 miles outside Los Angeles位于洛杉矶320千米外has become a second home for the Curiosity team.它已经成为了好奇号团队的第二个家Its an ideal place not just to test the Rover,这里不仅是测试火星车的理想地点but also to design the missions science.也是设计探测任务的理想地方Chief scientist John Grotzinger首席科学家约翰·格洛岑科is in charge of the experiments他所负责的实验that will enable the Rover to see into the past.使火星车能够探测到火星的过去Not by looking for bones or fossils,不是通过寻找遗骨或是化石but by trying to find elements crucial for life.而是找到与生命相关的重要物质Simple things,很简单的物质like liquid water.比如液态水重点解释:1.in charge of 负责; 主管例句:Youre responsible to whoever is in charge of sales.你要向主管销售的人负责。2.look for 寻找例句:He turned on the torch to look for his keys.他打开了手电筒,寻找钥匙。 201601/423702福州微创结扎去那比较好

福州市看不育去哪比较好栏目简介:;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。201505/374494龙岩哪里有做输卵管疏通 福州去哪间医院B超监测卵泡比较好

福州检查精子到哪家医院In response to North Koreas claim it successfully tested a hydrogen bomb, South Korea is resuming its propaganda broadcasts at the border.为回应朝鲜声称成功试验一枚氢弹,韩国正在恢复朝韩边境喊话广播。It may seem like an odd response to a nuclear bomb test, but the South has used these tactics before.看起来这是对朝鲜核爆炸试验的一种奇怪回应,但韩国此前就使用了这些战术。After land mines injured two South Korean border guards in August, the country blared criticism of North Korean leader Kim Jong-un, along with some peppy, Korean pop music. 八月两名韩国边境守卫遭地雷受伤,韩国大声批评朝鲜领导人金正恩,并使用一些活泼的韩国流行音乐。North Korea imposes a strict media blackout. Its citizens are only allowed access to state-run television and no outside media.朝鲜强制实行严格的媒体管制。只允许公民收看国有电视台,没有其它外部媒体。The North said the broadcasts threaten the ;dignity of our supreme leadership; and led to an exchange of artillery fire at the border. 朝鲜表示,广播危害着“我们最高领导的尊严”,并导致边境地区擦走火。Eventually both sides held a meeting that de-escalated the tension from the land mine incident.最终双方举行了一次会议,使地雷事件紧张局势降级。Regardless, the Norths hydrogen bomb claims have been met with skepticism worldwide. Many experts have said the blast wasnt large enough to be a hydrogen bomb.不管怎样,朝鲜声称的氢弹试验遭到全世界的怀疑。许多专家表示爆炸的威力没有达到氢弹级别。译文属。201601/420843 栏目简介:《英语学习入门视频》是英语视频听力下面的子栏目,栏目内容适合刚刚接触英语学习不久的童鞋学习。视频内容比较简单易懂,是入门英语知识的基础,有助于帮助英语学习爱好者逐步掌握基本的英语知识。201602/424534三明市不孕不育哪家医院好福州去哪家医院检查男科不孕不育最好



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