单词：potential energy head
单词：potential energy head 相关文章
By Peter Fedynsky Kyiv 30 September 2007 Ukrainians cast their ballots in a special parliamentary election, in which domestic and international observers sought to assure an honest vote.Opposition leader Yulia Tymoshenko says she will ask President V
2007年VOA标准英语（九月）
剑九test2 1Initiative/initiate/ launch/ pioneer/introduce/ develop2. National policy/NewZealand strategy 3. Global/international 4. Team effort/ institutional working party5. Hypothesis/guess/ speculation/ possibility/theory/potential6. Suitable/ap
雅思英语
Welcome to This I Believe, an NPR series presenting the personal philosophies of remarkable men and women from all walks of life. Support for NPR Podcasts comes from Visa, offering the Visa signature card, featuring concierge services for travel, din
2007年NPR美国国家公共电台
Welcome to the Science Talk, the weekly podcast of Scientific American posted on February 18th, 2010. I am Steve Mirsky. And you know what the hottest sport in the world is right now? Thanks to the Winter Olympics, it is, of course, curling. That's t
Scientific American(二)月
Potential energy in a crossbow When we think of the concept of energy, we often think of objects in motion: a car rolling down a hill or a jogger running up a hill. This kind of energy-in-motion, called kinetic energy, isnt the only kind of energy. A
英语时差8，16
And it's why, over the last eight years, we've modernized the government's approach to innovation for the 21st Century. 也因此,在过去的8年里,我们让政府在21世纪的创新方式上现代化。 We've jumpstarted a clean energy revolution
奥巴马每周电视讲话
New research suggests ayahuasca, a jungle vine found in the Peruvian rainforest, can have a powerful effect on the human central nervous system when brewed with other plants. Researchers say one of ayahuasca's most promising uses could be in treating
VOA标准英语2010年(三月)
By Selah Hennessy London 20 October 2009 A global watchdog group says world oil supplies are running low and that may lead to food shortages and spiraling armed conflict. Britain-based Global Witness says governments are doing nothing to prepare for
VOA标准英语2009年(十月)
ROBERT SIEGEL, HOST: Rudolph Giuliani, who's being mentioned as a possible secretary of state in a Trump administration, is best known for having been mayor of New York City on 9/11. In fact the terrorist attacks were near the end of his eight-year a
2017年NPR美国国家公共电台1月
Fusion is how stars produce energy. It occurs when the nuclei of light atoms, such as hydrogen, are fused together under extreme pressure and heat. Tokamak Energy, from Oxfordshire, believes that the third version of their compact, spherical tokamak
2015CRI中国国际广播电台
So what does that kind of constructive conflict require? 那么这种建设性的矛盾要求什么呢？ Well, first of all, it requires that we find people who are very different from ourselves. 首先呢，它需要我们去找到十分不同的人们
TED演讲教育篇
Online shopping, checking tomorrows weather, sending text messages, just some of the things people do on their phones. But what if you have motor disabilities or cant hold or touch a phone? Today, its almost impossible for them to directly interact w
VOA标准英语2018年(十二月)
By Mona Ghuneim New York 29 October 2007 The head of the U.N. nuclear agency says Iran's refusal to suspend uranium enrichment is regrettable, but said its willingness to cooperate with U.N. investigators is a step in the right direction. From VOA's
2007年VOA常速英语（十月）
By Mike O'Sullivan Los Angeles 11 February 2008 Striking Hollywood writers could return to work this week to end a three-month strike that has crippled film and television production. The news raises hopes that the Academy Awards, or Oscars, may go a
VOA常速英语2008年（二月）
By Lisa Schlein Geneva 15 September 2007 The United Nations warns floods in West Africa could provoke an invasion of locusts in Mali and Niger. It says it is critically important that UN experts be given access to the locust-prone region so they can
2007年VOA标准英语（九月）
BEIJING, June 25 (Xinhua) -- A senior Chinese official on Monday called for the country to speed up mass production of shale gas with its own technologies to ensure adequate energy supply. Efforts must be made to achieve early breakthroughs in the ap
英语新闻
How to Create Passion Anywhere and Anytime Remember Science class? Mr. Thatcher, sophomore year in high school, taught us about potential and kinetic energy. I was way more interested in Pam Miller, who sat perilously close to me. But on Mr Thatcher
阅读空间
TEHRAN, Aug. 15 (Xinhua) -- Iran said on Sunday it will not stop its nuclear fuel enrichment（丰富,改进） activities although Russia would provide it with the nuclear fuel needed to run its Bushehr nuclear power plant. Head of Iran's Majlis ( P
英语新闻
Swinging Physics: Potential And Kinetic Energy Working Together 动能与势能相互作用 动能是所有能看到的运动的能量，包括物体的，微粒的或质点集的运动等。 势能(Potential energy )是位置的函数，例如把一个
英语听力文摘 English Digest
Sit on a swing, let someone push you, and away you go. But what happens if the person who pushed you walks away, and you want to swing faster and higher. If you've ever been in the second grade, you know the solution to that. Just start pumping your
英语时差8，16