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吉安吉州区青原区吉安县井冈山市看不孕多少钱

2018年04月24日 16:31:23 | 作者:安心频道 | 来源:新华社
The beginning of a new year for Aymara people土著民族艾马拉人黎明狂欢庆祝新年In the southern hemisphere, Monday marked the winter solstice and, in Bolivia, the Aymara-one of the country#39;s thirty ethnic groups-celebrated it as the beginning of the new year, 5523.在南半球,周一标志着冬至的到来。而玻利维亚的第30个民族艾马拉人正在迎接第5523个新年。They gathered at the Illimani mountain to welcome the sunrise.这个民族的人齐聚在伊利马尼山迎接日出。The Aymara believe the Illimani mountain can protect them.艾马拉人相信这座山在冥冥之中可以保护他们。Since 2001, the Aymara new year has become a national holiday in Bolivia.自2001年以来艾马拉人的新年就成为玻利维亚的法定假日。译文属 Article/201506/382131栏目简介:《英国节日简介》是英语视频听力下面的子栏目,栏目通过英式英语视频讲解的形式来介绍英国的节日,能够帮助英语学习爱好者更好地了解英国的节日文化传统,从而加深对英语中一些习惯用语的理解,是提高英语文化素养的好材料。 Article/201510/400267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 Shanghai#39;s 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。 Article/201504/370563瑞秋·波特斯曼谈到人“生来即知分享”--并展示了像Zipcar和Swaptree这样的网站正在改变人类的行为模式 Article/201503/365070

No creatures have ever dominated the earth like the dinosaurs,没有哪种生物能像恐龙那样统治地球but the great mystery at the heart of the dinosaur story is how they came to take over the world.但是恐龙的故事中却包藏着一个巨大的谜团,那就是它们如何称霸世界Since the very first dinosaur fossils were found scientists have puzzled over this one big question.自从第一块恐龙化石发现之时,这个问题便一直使科学家们感到困惑不解Now scientists are exploring a remarkable new fossil site in a remote part of Argentina that may hold the answer.现在,科学家们正堪察一处位于阿根廷偏远地区的新的化石场,这个不寻常的地方或许能给出There is a very, very good possibility that these dinosaurs are telling us这非常非常有可能,这些恐龙能告诉我们the big story in terms of the evolution of the whole of the dinosaurs.关于恐龙整个进化过程的故事It may be that scientists can now begin to fill in the last great gap in our knowledge of the dinosaurs,现在科学家们或许可以开始填补我们关于恐龙认识中的巨大空白how they rose up from humble beginnings to rule the world.它们如何从卑贱的生物开始,一步步成为世界的主宰 Article/201704/501654

Light bulbs used to be simple,just run a bunch of electrical current through a thin wire.until it heats up enough to start glowing,Bare filament electric lamps were first demonstrated around 1800 by Humphry Davy,and the glass bulb was added later,to keep oxygen away from the wire,so it could glow for a long time without actually burning up.早期灯泡的原理十分简单。把电流通过一段细金属丝里,直到它热到开始发光就行。1800年前后,汉弗里 戴维发明了一种灯丝裸露的灯泡,随后玻璃灯管被整合进了设计,为灯丝隔绝氧气,让灯丝更耐用而不会很快烧化。So the incandescent light bulb is 19th century technology ,and by now there is a blinding array of electric lamps,halogen light bulbs,fluorescents,mercury and sodium vapor lamps,LEDs and so on.Each one makes its own clever use of physics to achieve the life goal of a light bulb:converting electrical current into visible light.这么说来白炽灯泡其实是19世纪的技术。而现在,市场上可供选择的灯泡琳琅满目,卤素灯。荧光灯,水银或钠蒸汽灯,发光二极管等等,每一种都巧妙应用了物理原理来完成电灯的任务:把电流转化为可见光。Here#39;s how they work:halogen bulbs have the same tungsten metal filament,as typical incandescent light bulbs,but they contain a little bit of halogen based gas in the bulb as well,The chemistry of the halogen gas,allows it to capture stray tungsten atoms that evaporate off the filament and shepherd them back to where they belong,which both prolongs the life of the filament,as well as keeps the insides of the bulbs clean and clear.我们接下来说说它们的原理,卤素灯和白炽灯一样,有一根钨制的金属灯丝,但是它们的灯泡中还有一些卤元素的气体化合物。这些化合物的化学性质,使得他们可以捕捉从灯丝蒸发的钨原子,再把它们重新附着在灯丝上,这样既延长了灯丝的寿命,还能让灯泡干净透亮。Fluorescent bulbs are basically gas-filled tubes,with electrodes as both ends,Electrical current flows one electrode to another,and when the electrons that make up the current bump into mercury atoms in the gas,the energy of the collision makes the atoms get;excited;that#39;s the technical term,and the atoms then emit visible and ultraviolet light.荧光灯本质上就是填充了气体的管子,两端接上电极,电流在两个电极之间流动,当电流中的电子与气体中的汞原子碰撞时,碰撞的能量让原子“兴奋”起来(激发)术语就是这个?之后原子会发出可见光和紫外线。The white coating on the inside of the glass,absorbs the ultraviolet light and re-emits it as more visible light,The process is called ;fluorescence;and is the namesake of the bulb.Because the coating stops the UV light,it also keeps the bulb from giving you cancer,Unless that#39;s what you want in which case you use a tanning bulb with a different kind of coating.灯管内部的白色涂层 会吸收紫外线在放出更多的可见光 这个过程叫做“荧光” 荧光灯就是因此命名,因为灯管里的涂层吸收了紫外线,使用这种灯泡没有致癌风险 如果你想做死的话,那你需要去照有另一种涂层的美黑灯。Vapor Lamps:Sodium, mercury and metal-halide vapor lamps,which are commonly used for lighting streets warehouse, gymnasiums and another large areas,are also tubes that run electrical current through a gas.The gas itself emits mainly visible light.so these bulbs don#39;t need a fluorescent coating.蒸气灯:钠,水银或金属卤化物蒸汽灯 经常被用于马路,仓库,体育场和其他大型场地的照明,原理也是将电流通入充满气体的灯管中 填充的气体主要发出可见光,所以这些灯泡不需要荧光涂层。Light Emitting Diodes(LEDs):Finally,LEDSs are also like fluorescent light bulbs,except replace the gas with a tiny crystal of semi-conducting gallium,and throw away the bulb,So not like fluorescent bulbs.发光二极管:发光二极管跟荧光灯其实很像,只不过把气体换成一小块半导体晶体镓 再把玻璃灯管扔掉,其实跟荧光灯不同的?But seriously,the semiconductor has two layers,one of which provides excited electrons with lots of energy,while the other provides a place for the electrons to go and ;relax;,That IS the technical term,all you need is an electrical current to transport the electrons from the party side,to the SPA side,where they release the energy of their excitement as light,Viola! A light emitting diode!Perfect for human parties!实际上,半导体由两层组成,一层富含充满能量的激发态(兴奋)电子 另一层电子“放松”下来,这个也是术语来的(回到基态) 电流把激发态电子送到二极管的另一端,在这里电子由激发态跃迁回基态,能量以光子散发出来,铛铛!发光二极管!拿来给人类开派对再合适不过呢! Article/201503/361964

Our world. warm, comfortable, familiar.我们的世界,温暖、舒适,熟悉But when we look up, we wonder:但当我们仰望天空,我们想知道Do we occupy a special place in the cosmos?我们是居住在宇宙中一个独特的地方Or are we merely a celestial footnote或仅仅是太空的小小一隅?Is the universe welcoming or hostile?宇宙是友善的还是充满敌意?We could stand here forever, wondering我们是一直站在这里猜想Or we could leave home on the ultimate adventure还是离开故园来一次终极探险To discover wonders去发现奇观Confront horrors直面恐怖Beautiful new worlds美丽的新世界Malevolent dark forces邪恶的黑暗势力The Beginning of time.时间的起点The moment of creation.创世的时刻Would we have the courage to see it through?我们是否有坚持到底的勇气Or would we run for home?或是逃回家?There#39;s only one way to find out想找到只有一个方法Our journey through time and space begins with a single step.我们开始一步步时空之旅At the edge of space, only 60 miles up...离地面60英里(100公里)高度,就是太空边缘......just an hour#39;s drive from home仅仅一个小时车程Down there, life continues.地面上,生活在继续The traffic is awful, stocks go on trading车水马龙,商业繁忙...and Star Trek is still showing《星际迷航》还在播出When we return home, if we return home...当我们回到家,如果我们还能回家...will it be the same?一切还会如初吗?Will we be the same?我们还是原来的我们吗?We have to leave all this behind我们必须抛掉这一切To dip out toes into the vast dark ocean步入前方广阔的黑暗海洋On to the Moon.前往月球 Article/201505/375566

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