单词:surface friction drag
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VOICE ONE: I'm Mario Ritter. VOICE TWO: And I'm Steve Ember with EXPLORATIONS in VOA Special English. This week, we tell about some of the biggest space stories of two thousand nine. First, there was the American space agency's discovery of water on
But the friction and heat wears away at the space rock, the hot air actually melts the metal surface, and often the collision with the atmosphere can have a shattering effect, splitting the meteorites along fissures. This is an actual meteorite, and
Ma-ia-hii Ma-ia-huu Ma-ia-hoo Ma-ia-haa Alo, Salut, sunt eu, un haiduc, Si te rog, iubirea mea, primeste fericirea. Alo, alo, sunt eu Picasso, Ti-am dat beep, si sunt voinic, Dar sa stii nu-ti cer nimic. Vrei sa pleci dar nu ma, nu ma iei, Nu ma, nu
郭美美-不怕不怕-英文版 Ma-ia-hii Ma-ia-huu Ma-ia-hoo Ma-ia-haa Alo, Salut, sunt eu, un haiduc, Si te rog, iubirea mea, primeste fericirea. Alo, alo, sunt eu Picasso, Ti-am dat beep, si sunt voinic, Dar sa stii nu-ti cer nimic. Vrei sa pleci
By David McAlary Washington 06 March 2006 The newest American mission to Mars is hurtling toward the red planet, due Friday to examine it in the sharpest detail yet. It will be the largest spacecraft
By David McAlary Washington 10 March 2006 Mars Reconnaissance Orbiter Another U.S. spacecraft has begun orbiting Mars to study the red planet in unprecedented detail. The Mars Reconnaissance Orbiter w
今天,Michael 和他的中国同学李华约好了在中央公园见面。他们在对话中会用 到两个词:drag 和 trip。 L: 对不起,Michael,我迟到了。地铁误点了。 M: Hey,
New Skateboard Defies Gravity WASHINGTON A futuristic dream only a couple of decades ago, the hoverboard a skateboard that floats above the ground - has finally been made possible. While still not ready for mass production, it promises to become a co
我们前两次已经讲了好几个以fight为关键词的习惯用语。我们今天还要再讲两个。第一个是: knock-down drag-out fight。Knock-down意思是击倒,而drag-out可以解释拖出来。听了这个习惯用语你很可能会联
Scott and his final team of five arrived at the South Pole in 1912 January to find they had been beaten to it by a Norwegian team led by Roald Amundsen, 1912年一月,斯科特和他的五人小分队 到达了南极点。但不巧,他们发现由挪
Scott and his final team of five arrived at the South Pole in 1912 January to find they had been beaten to it by a Norwegian team led by Roald Amundsen, 1912年一月,斯科特和他的五人小分队 到达了南极点。但不巧,他们发现由挪
Mom:Come to think of it, you should get out your English books and catch up on your reading assignments. Lily:But I don't have any reading assignments. Mom:Then review for your test. You'll do even better. And maybe reading will help you get to sleep
Huygens Spacecraft Arrives at Saturn Moon “慧更斯”号抵达土星卫星 After a seven-year ride to Saturn on the U.S. Cassini spacecraft, the European Space Agency's Huygens probe is finally at
to put on the back burner to drag one's feet 我们经常说做事要看轻重缓急,有的时候不得不把正在做的事或计划要做的事先搁置一边。美国人把这叫做:to put on t
The leader of Zimbabwe's smaller opposition faction says negotiations on the country's political crisis are a three-way affair and no one party can sign a settlement deal with another. Peta Thornycroft reports from Harare. Arthur Mutambara (14 April
今天我们要学的词是, drag。 Drag, 做为名词,有累赘,拖累的意思。美国联邦储备委员会主席伯南克认为,房屋市场的不景气会继续成为美国经济成长的绊脚石。Federal Reserve Chairman Ben Bernanke
今天我们要学的词是drag。 Drag, 做为名词,有累赘,拖累的意思。美国联邦储备委员会主席伯南克认为,房屋市场的不景气会继续成为美国经济成长的绊脚石。Federal Reserve Chairman Ben Bernanke sai
今天我们要学的词是drag。 Drag, 作为名词,有累赘的意思。 He did not want to be a drag on his children, 他不愿意成为孩子们的负担。 He has always been a drag on the group, 他总是给集体拖后腿。 在美国总统大
On our last program, we learned how water bugs manage to stand on the surface of a pond: The pads of their feet resist contact with the water just like wax paper does. This allows the bug to rest on the thin film of surface tension that naturally cov
Why Frisbees Fly With a gentle flick of the wrist on a warm summer day, you can launch a frisbee on a long and graceful flight. Why do they fly so well? One reason is something called gyroscopic force. This is the tendency of a spinning object to mai