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As they grow bigger and bigger, 随着体积越来越大 they start to spin and throw out a disk of debris 它们开始旋转,甩出的碎屑形成盘状 that will coalesce to form a solar system. 在日后融合形成太阳系 This kind of process

发表于:2018-12-07 / 阅读(186) / 评论(0) 分类 太阳科普

Broadcast: Jan 22, 2003 By Marilyn Christiano VOICE ONE: This is Steve Ember. VOICE TWO: And this is Sarah Long with the VOA Special English program, Explorations. Today we tell about a scientist who

发表于:2018-12-07 / 阅读(158) / 评论(0) 分类 VOA2003(上)-科技导航

Americas Mass Transit Ridership at Its Highest in Decades美国的公共交通客流量达到几十年来的最高点 NEW YORK A record number of Americans are moving into cities and, at the same time, are curbing their driving habits. No better exam

发表于:2018-12-16 / 阅读(113) / 评论(0) 分类 VOA标准英语2014年(四月)

Residents tended to stay thinner when a commuter train was added to their region, because of increased exercise walking to and from stops City planners and citizens alike frequently push for better public transportation. They argue that it can lessen

发表于:2019-01-02 / 阅读(161) / 评论(0) 分类 60秒科学

Mass School Shootings Mostly in Small US Towns In the United States, mass school shootings are most likely to happen in small towns and suburban areas. One example is the shooting last week at a high school in Santa Fe, Texas. Ten people died in the

发表于:2019-01-03 / 阅读(174) / 评论(0) 分类 2018年VOA慢速英语(五)月

Century-Old Sailor Songs Delight Crowds Peter Kasin has been on staff with San Francisco's Maritime National Historical Park for 20 years. Like other park rangers, he escorts sightseers and ensures their safety during their visits. But there's one pa

发表于:2019-01-04 / 阅读(150) / 评论(0) 分类 VOA标准英语2012年(一月)

分集介绍:导数,斜率,速度与变化率 Derivatives.slope.velocity.rate.of.change

发表于:2019-01-05 / 阅读(391) / 评论(0) 分类 麻省理工学院公开课:单变量微积分

City planners and citizens alike frequently push for better public transportation. They argue that it can lessen traffic and reduce emissions from cars. Now theres a new reason to be gung-ho about public transitit helps make people skinnier. Thats ac

发表于:2019-01-08 / 阅读(108) / 评论(0) 分类 Scientific American(七)月

One hundred years ago today, September (the) 27th, 1905, a physics paper was dropped into the mail, addressed to a German journal called AT. The paper was penned by a 26-year-old Swiss patent clerk with dark curly hair years before he sprouted that s

发表于:2019-01-08 / 阅读(206) / 评论(0) 分类 2005年NPR美国国家公共电台

Skelling Loreena McKennitt O light the candle, John The daylight has almost gone The birds have sung their last The bells call all to mass Sit here by my side For the night is very long There's something I must tell Before I pass along I joined the b

发表于:2019-01-10 / 阅读(360) / 评论(0) 分类 好听的英文歌曲

By Paul Sisco Washington, DC 24 January 2007 watch New Boat Design report In Greek mythology, Proteus was a sea god capable of assuming different forms. And now Proteus also is the name of a new type of ocean-going ship that can adapt its shape to t

发表于:2019-01-10 / 阅读(192) / 评论(0) 分类 2007年VOA标准英语(一月)

Scientists Testing Space Propulsion by Light 科学家测试太阳能动力 Can the sun provide power for a spaceship to travel to the edge of our solar system? The answer may come from a small satellite. A Delta V rocket carried the satellite into s

发表于:2019-01-12 / 阅读(141) / 评论(0) 分类 2015年VOA慢速英语(六)月

LULU GARCIA-NAVARRO, HOST: When the parishioners at one church in upstate New York gather for worship each week, many of them are armed. The church even advertises its open-carry policy online. From member station WRVO, Payne Horning reports. (SOUNDB

发表于:2019-01-16 / 阅读(138) / 评论(0) 分类 2018年NPR美国国家公共电台4月

The explosion generated a shockwave so massive it wasdetected over 15,000 kilometres away. The low-frequency waves were picked up bymonitoring stations. So it is kind of like a listening network around theworld. Thats right. Theyre not set up for fir

发表于:2019-01-23 / 阅读(104) / 评论(0) 分类 探索与发现2014年

During the entire swim even well below the surface游动虽然是在水面下进行 there is some light that comes through 但仍然有一些光能够通过 It is comforting to know that there is open water above you这能让你知道 上方没有船只

发表于:2019-01-25 / 阅读(121) / 评论(0) 分类 公众人物毕业演讲

All right then! Imagine this weapon to be ten times stronger and the animal ten times more powerful, launch it at a speed of twenty miles per hour, multiply its mass times its velocity, and you get just the collision we need to cause the specified ca

发表于:2019-01-27 / 阅读(115) / 评论(0) 分类 《海底两万里》中英双语有声读物

EXPLORATIONS – Albert Einstein By Marilyn Christiano Broadcast: Wednesday, February 23, 2005 VOICE ONE: This is Steve Ember. VOICE TWO: And this is Sarah Long with the VOA Special English program, E

发表于:2019-01-28 / 阅读(154) / 评论(0) 分类 Explorations

By Barbara Schoetzau New York 20 April 2008 Pope Benedict XVI ended his six-day visit to the United States with a jubilant mass at the 57,000-seat Yankee Stadium. From VOA's New York Bureau, correspondent Barbara Schoetzau reports the leader of the w

发表于:2019-01-31 / 阅读(152) / 评论(0) 分类 VOA常速英语2008年(四月)

横扫全欧古典跨界美声,璀璨、圣洁、温馨的银白色冬季,福泽再度如雪花般缤纷降临 。几位传统教堂的圣歌吟唱者成为一场音乐革命的先驱!在格利高理教皇合唱团出现之前,谁都没想到从西元七世纪传下的格利高理圣歌咏唱,竟能超越时空囿限溶入二十甚至廿一世纪的音乐铸模

发表于:2019-02-04 / 阅读(190) / 评论(0) 分类 音乐咖啡厅

His famous equation, E =mc 2 , did not appear with the paper, but came in a brief supplement that followed a few months later. As you will recall from school days, E in the equation stands for energy, m for mass, and c 2 for the speed of light square

发表于:2019-02-17 / 阅读(117) / 评论(0) 分类 万物简史
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