数千年来,大气中碳12和碳14的比例是稳定不变的,然而,二十多年以来的原子弹试验,使得碳14的水平增加。生长中的葡萄吸收了空气中的二氧化碳,而通过测试葡萄中的碳含量,就可以大致

发表于:2019-01-02 / 阅读(117) / 评论(0) 分类 60秒科学

EXPLORATIONS - November 6, 2002: Space Digest By Paul Thompson VOICE ONE: This is Mary Tillotson. VOICE TWO: And this is Steve Ember with the VOA Special English program EXPLORATIONS. Today we tell ab

发表于:2019-01-02 / 阅读(73) / 评论(0) 分类 Explorations

SCIENCE IN THE NEWS - Mars Once Had Moving Plates Like Earth Has Now By Katherine Gypson, Cynthia Kirk and Karen Leggett Broadcast: Tuesday, November 08, 2005 (MUSIC) VOICE ONE: This is SCIENCE IN THE

发表于:2019-01-02 / 阅读(64) / 评论(0) 分类 科技之光

When my schedule ends, MIRA briefly shows me how I progressed throughout my session. 当我的疗程结束时,MIRA能够显示纪录概况,告诉我自己在疗程中的全程表现如何。 I have just shown you three different games for kids, adu

发表于:2019-01-03 / 阅读(54) / 评论(0) 分类 TED演讲科学篇

I dreamed I was missing, you were so scared 我在梦中迷失你恐惧万分 But no one would listen, cause no one else cared 没有人倾听 因为没有人在意 After my dreaming, I woke with this fear: 梦醒了恐惧依然没有消散 What am I leaving when I'm done here? 我该

发表于:2019-01-07 / 阅读(148) / 评论(0) 分类 音乐咖啡厅

NASA's Curiosity Rover on Mars LAUREL BOWMAN: There will be several weeks of tests before NASA lets its robotic vehicle, called Curiosity, explore the surface of Mars. Curiosity will look for evidence that the planet once might have had conditions ne

发表于:2019-01-12 / 阅读(77) / 评论(0) 分类 2012年VOA慢速英语(八)月

SCIENCE IN THE NEWS - The Moving Story of Plate Tectonics FAITH LAPIDUS: This is SCIENCE IN THE NEWS, in VOA Special English. Im Faith Lapidus. BOB DOUGHTY: And Im Bob Doughty. Scientists who study the Earth tell us the continents and ocean floors ar

发表于:2019-01-12 / 阅读(107) / 评论(0) 分类 2012年VOA慢速英语(一)月

AS IT IS 2014-08-07 Rosetta Spacecraft Catches a Comet 罗塞塔航天器捕捉到一颗彗星 After a 10-year trip, a European spacecraft has, for the first time, entered an orbit around a comet. The European Space Agencys Rosetta spacecraft began a

发表于:2019-01-12 / 阅读(46) / 评论(0) 分类 2014年VOA慢速英语(八)月

AS IT IS 2015-09-25 Rare 'Supermoon' Eclipse Only Days Away Many people are looking forward to something unusual in the skies this weekend. In fact, astronomers note that an event like this last happened 33 years ago! People will have a chance to wit

发表于:2019-01-12 / 阅读(65) / 评论(0) 分类 2015年VOA慢速英语(九)月

A few months ago the fairy tale came true. 几个月前,童话故事成真了! We announced to the world that we know what these streaks are. It's liquid water. 我们向世界宣布,我们已经知道这些条纹是什么了。是液态水。

发表于:2019-01-18 / 阅读(86) / 评论(0) 分类 TED演讲科学篇

Broadcast: Jan 10, 2003 By George Grow This is the VOA Special English ENVIRONMENT REPORT. American scientists say rising temperatures on Earth's surface are forcing animals and plants to move to cool

发表于:2019-01-20 / 阅读(169) / 评论(0) 分类 VOA2003(上)-社会广角

Scientists say the surface of the Earth is cracked like a giant eggshell. They call the pieces tectonic plates. As many as twenty of them cover the Earth. The plates float about slowly, sometimes crashing into each other, and sometimes moving away fr

发表于:2019-01-22 / 阅读(88) / 评论(0) 分类 英语时差8,16

Well then, when you dive under the waves, Ned, for every thirty-two feet of water above you, your body is tolerating the pressure of one more atmosphere, in other words, one more kilogram per each square centimeter on your body's surface. 尼德兰,好

发表于:2019-01-28 / 阅读(61) / 评论(0) 分类 《海底两万里》中英双语有声读物

Even the whorehouse was down there, nothing on the surface but a wooden shack no bigger than a privy, with a red lantern hung over the door. 就连妓院也在地下,从地面上看,它们只是比厕所大不了多少的小木屋,门上挂了盏

发表于:2019-01-30 / 阅读(58) / 评论(0) 分类 冰与火之歌系列之《权力的游戏》

US Space Probe to Reveal Comet's Secrets 美国航天探测器揭示彗星状况 A U.S. spacecraft is completing afive-and-a-halfmonth voyage to a distant comet and could create celestial fireworks wh

发表于:2019-01-31 / 阅读(110) / 评论(0) 分类 VOA2005(下)--环境科学探索

Snaping turtles can weigh up to 70 pounds and kill each other by decapitation. 啮龟重量可达七十磅 它们残杀的方式就是咬断对方的脖子 Better off holding him by the tail, actually.Where is he? 你提起它的时候最好抓住它的

发表于:2019-02-13 / 阅读(55) / 评论(0) 分类 荒野求生

Those waves hitting the sand actually begin far out at sea. And it doesnt take much to get them going. A little wind will do the trick. First the wind blows over the surface of the water, generating the little ripples you can see just by blowing acro

发表于:2019-02-23 / 阅读(81) / 评论(0) 分类 英语时差8,16

Its summertime, and youre on vacation. You sit beside a quiet pond, fishing, trying to relax, trying to think about nothing at all. You watch the leaves stirring, the water rippling in the sunshine, and the water bugs standing on the surface of the w

发表于:2019-02-23 / 阅读(112) / 评论(0) 分类 英语时差8,16

For an hour plains of sand unrolled before our steps. 在一小时内,一片细沙的平原在我们脚下摆开。 Often the seafloor rose to within two meters of the surface of the water. 平原时常升至距海面不及两米的深度。 I coul

发表于:2019-02-25 / 阅读(82) / 评论(0) 分类 《海底两万里》中英双语有声读物

You call me up about 2 in the morning You say I know it's late but can I see you? Somethings been on your mind Your saying that I hide behind a wall I'm frontin And you just want to get through But what happens when the honeymoon ends Then you take b

发表于:2019-02-26 / 阅读(73) / 评论(0) 分类 英文摇滚歌曲