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郴州第一人民医院治疗男性不育多少钱郴州市男性专科郴州市第一医院龟头炎症 Its easy to appreciate the power of the sun在这样炎热的夏日,站在德州湾海边on a nice hot summers day like here on the Texas Gulf Coast.不难体会太阳的威力And you can feel the power of the sun on your skin,皮肤能清楚感受到太阳的热力sunscreens is on.我擦了防晒乳液But man the sun is just you know但太阳实在…the actual physics of whats going on inside the sun,太阳内部的物理作用the power of the sun,太阳的力量the energy that the sun is releasing和释放的威力is almost beyond comprehension.几乎超出我们的理解范围But it is only almost beyond comprehension.但只是“几乎”超出我们的理解范围And you can measure its power output with some simple apparatus.我们可以用简单的装置测量太阳的能量输出One of the earliest experiments to try and measure最早尝试测量太阳威力的人之一the actual power of the sun was by astronomer William Herschel是19世纪的天文学家in the 19th century,威廉赫歇耳where he had the brilliant idea of他的想法很高明just watching a piece of ice melt就是观察一块冰块融化to see how long it would take and therefore记录所需的时间from the properties of the ice work out再根据冰块的特质how much sunlight was coming to the ground.计算地面的日照量As a demonstration of the suns power用这个实验来展现太阳的力量it doesnt look that impressive.看起来似乎没啥了不起But Hershel realized that he could use但赫歇耳发现the time it takes to melt one bit of ice to他可以用冰块融化所需的时间calculate the suns total power output.计算太阳能量输出的总量So here we see the ice is almost completely melted过了29分钟…将近半小时后in roughly 29 minutes almost half an hour.冰块几乎完全融化But Herschel was able to use this experiment但是赫歇耳得以使用这个实验and the time that it took to,和冰块融化所需的时间to melt the ice to work out some basic properties of the sun.推算出太阳的某些基本特性Heres how Herschels thinking worked.赫歇耳的立论依据如下:In the time it takes to melt a slab of ice on Earth在融化地面冰块所需的时间内the sun is radiating heat in all directions太阳朝四面八方释放热力enough to melt a complete shell of ice around it足以融化包围太阳的冰层a diameter of 300 million kilometres.冰层直径为三亿公里A shell half a centimetre thick厚度0.5厘米的冰层and 300 million kilometres across contains a lot of ice.直径三亿公里,含有大量的冰Enough to make an ice cube bigger than the Earth.足以形成比地球还大的冰块To melt that much ice in just 30 minutes要在30分钟内融化这么多冰would take an energy input of a billion billion billion watts.所需的能量输出,高达10的27次方瓦特Its a rough, but surprisingly accurate experiment这个实验看似粗糙,但却出奇地精准modern satellite ings confirm the figures to within a few percent.现代卫星读数实了,其误差不超过几个百分点Its an almost unimaginable amount of energy.此能量大得几近难以想像If we could harness the suns power output要是能够充分利用太阳能for a single second it would satisfy the worlds energy只要短短一秒就足以满足世界demands for the next million years.未来一百万年间的能源需求But its one thing to know how much power the sun is producing.但推算太阳产生的能量多少是一回事Its something else to know how it is doing it.厘清其制造过程又是另一回事Until the middle of the 20th century no-one had any idea在20世纪中期之前,没有人明白what made the sun work.太阳的运作原理For scientists in Hershels time it was a mystery.对赫歇耳时代的科学家而言,这是个不解之谜Well one of the issues was of course what powered the sun.议题之一当然是,太阳的动力来源And - um - some very clever people actually有些颇有才智的人士甚至觉得considered the fact that the sun might be powered by burning coal.太阳的动力可能来自燃煤I mean it seems ludicrous but why not coal.这种说法听起来荒谬,但又有何不可呢?That was an important source of energy on the earth.毕竟在19世纪的那段时间Er in that part of the 19th century煤炭是地球的重要能量来源If the sun was made entirely of coal,但若太阳由煤炭组成there would be one unfortunate consequence.会产生一个不幸的后果It would burn itself out in just a few thousand years.它会在几千年后燃烧殆尽201503/367060栏目介绍:搞笑英语轻松学通过不同的搞笑生活片段来学习日常口语,领域涉及生活的各个方面,让我们边看视频边学英语。正宗地道的口语,假一罚十。美剧电影真人秀都看过了之后还能看什么学口语呢?当然是看这些双语视频啦!又好玩,又原汁原味,又顺便学一两句地道英语,多痛快!快来看看吧!201509/399824苏仙区治疗前列腺炎哪家医院最好

郴州早泄哪家医院治疗最好栏目简介:;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。201508/391677郴州包皮哪家医院最好 How to Celebrate Chinese New Year农历新年,这样过就对了!How to Celebrate Chinese New Year如何欢庆中国新年Chinese New Year, also known as Lunar New Year, is celebrated throughout the world in late January or early February. Heres how to celebrate.中国新年,也称为农历新年,是在一月底或二月初时被世界各地人们欢庆的。这里是庆祝的方式。You will need: The correct date, traditional foods, new, red clothing, red envelopes, and red paper lantern.你将需要:确切的日期、传统美食、红色新衣、红包、还有红色纸灯笼。Optional: Firecrackers, and drums and gongs.非必须的事物:鞭炮、还有锣鼓。Step one: Find the next date of Chinese New Year, which changes with the lunar cycle. Learn which of the 12 zodiac animals is associated with that years celebration.第一步:找出下一个中国新年的日期,那会随着月亮周期改变。知道十二生肖中哪一个动物和那年的庆典有关。Step two: Before the Chinese New Year arrives, clean your house, and settle any outstanding debts with friends. According to tradition, this helps the New Year get off to a fresh start. Clean the headstones of deceased relatives and friends to ensure spiritual favor.第二步:在中国新年来临前,打扫你的屋子,并结清任何朋友之间未偿还的债务。根据传统,这会帮助新的一年有个好的开始。清扫逝世亲友的墓碑来确保神灵保佑。Step three: Get together with friends and family on the eve of Chinese New Year for a reunion dinner, a large, celebratory feast. Make a batch of nian gao, steamed cakes made with rice flour, which are said to bring good luck.第三步:在中国新年前夕和朋友家人相聚吃顿团圆饭,那是一场盛大的欢庆飨宴。做一批年糕,那是用米粉做成的蒸蛋糕,据说会带来好运。Step four: Buy new, red clothes to wear throughout the Chinese New Year celebration; the color is considered lucky.第四步:买红色的新衣裳在中国新年庆祝活动中穿着;这颜色被认为是吉利的。Step five: Give red envelopes filled with money to friends and relatives to invite success and generosity into everyones lives. Use an amount ending in eight, which is particularly lucky in Chinese culture, and avoid the number four.第五步:分送装满钱的红包给亲友,将成功和慷慨迎进每个人的生活。用 8 结尾的金额包,那在中华文化中是特别吉利的,且要避免数字 4。Step six: Attend a Chinese New Year parade, one of the most popular ways to celebrate the holidays hopeful spirit. You can also light firecrackers and bang drums and gongs to celebrate. Only use firecrackers or fireworks under close supervision. Know the laws governing explosives where you live.第六步:参加一场中国新年游行,那是庆祝此节日充满希望的精神最受欢迎的方式之一。你也可以放鞭炮,还有敲锣打鼓来欢庆。只能在密切注意下使用鞭炮或烟火。了解你居住地管制爆裂物的法规。Step seven: On the 15th night of the New Year, light a red paper lantern to mark the end of the holiday. Then, wish your friends and family ;Gong Xi Fa Tsai,; and prepare for 12 months of prosperity and luck.第七步:在新年的第 15 个晚上,点亮红色纸灯笼来象征节日的尾声。接着祝贺你的朋友和家人“恭喜发财”,准备好迎接十二个月的兴旺和好运。Did You Know? In 1980, the Chinese were the 10th-largest immigrant group in the U.S.; by 2006, they had become the third-largest.你知道吗?在 1980 年,中国人是美国第十大的移民族群;在 2006 年时,他们已变成第三大。201508/390203郴州市做包皮手术

宜章县龟头炎症栏目简介:《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。201510/399258 请在TED里与面包师、食物学家、大厨、农民和饕餮们共坐一桌,探究食物的真知。201506/378382郴州扁平疣治疗郴州东方医院不育



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