单词：earth parabolic speed
单词：earth parabolic speed 相关文章
By Jill Moss Broadcast: July 28, 2003 This is Bill White with the VOA Special English Development Report. Millions of people around the world cook their food over a smoky fire every day. It is often d
VOA2003（下）-发展与科学
ANNOUNCER: EXPLORATIONS -- a program in Special English by the Voice of America. (MUSIC) Neil Armstrong with the X-15 Today, Doug Johnson and Frank Oliver tell about the first airplane that flew out of the Earth's atmosphere. It was designed to test
VOA慢速英语2007年（九）月
EXPLORATIONS - High and Fast: the X-15 Reached the Edge of Space EXPLORATIONS -- a program in Special English by the Voice of America. Today, Doug Johnson and Frank Oliver tell about the first airplane that flew out of the Earth's atmosphere. It was
2012年VOA慢速英语(十)月
Dictation Instructions Listen to the following passage or together the passage will be read to you four times. During the first reading which will be read in normal speed .Listen and try to understand the meaning . For the second and third readings t
英语六级听力练习集锦
说一口流利的英语，从简单的单词开始。 听听，读读，背背，今天你的词汇量又增加了5个。 单词/词义 中英例句 单词听读 fine [ fain ] This flat's fine for two people. adj. 舒适的 这套公寓适合两个人
每日攻克5词
A Stationary Satellite, part 2 A geostationary satellite orbitsthe planet at the same rate as the planet rotates, so the satellite is always over the same patch of ground. Cool! you say. Id like to have one of those about twenty feet over my house. S
英语听力文摘 English Digest
Galactic Rotation 银河系自转 Astronomers calculate there is ten times more matter in our Milky Way galaxy than we can actually see. Discover how the orbital motions of stars in the galaxy reveal dark matter -- on today's Earth and Sky. JB: I'm Joel
(科普英语)Earth and Sky
One evening I drove my husbands car to the shopping mall. 一天晚上，我开着丈夫的车去购物。 On my return I noticed that how dusty the outside of his car was and cleaned it up a bit, when I finally entered the house, I called out, The w
英语小短文
This is the VOA Special English Development Report. Millions of people around the world cook their food over a smoky fire every day. It is often difficult to find wood for the fire. People who do not have wood must spend large amounts of money on co
VOA慢速英语2008年（九）月
Hawking, Zuckerberg to Search for Life in the Universe 霍金、扎克伯格寻找外星生命 It is one of the oldest questions ever asked: Are we alone or is there other life out in the Universe? Last week, an international team of scientists and b
2016年VOA慢速英语(四)月
By Greg Flakus Albuquerque, New Mexico 25 July 2007 Large scale collection of solar power arrays As the world searches for ways to produce energy without burning fossil fuel, there is increased interest in solar energy. One place associated with sola
2007年VOA标准英语（七月）
DEVELOPMENT REPORT – May 13, 2002: Solar Cookers By Jill Moss This is the VOA Special English Development Report. Millions of people around the world cook their food over a smoky fire every day. It
农业与发展
But the faster you go, the more time dilates. 但是行驶的速度越快，时间的膨胀越多。 For astronauts orbiting the Earth for 800 days, it starts to add up. 如果宇航员们环绕地球800天，其影响就会明显。 But what affects
TED演讲教育篇
Have you ever daydreamed about traveling through time, perhaps fast forward in the centuries and seeing the distant future? 你曾白日梦过穿越时空吗？或者穿越到几百年之后及看到遥远未来？ Well, time travel is possible, and
TED演讲教育篇
Wall Street analysts searching for reasons for the U.S. stock market's sharp swings in early August point to high unemployment, the European debt crisis and other basic economic problems. But some also suspect what is known as high-frequency trading,
英语新闻
Hello and Welcome to News and Reports on China Radio International. In This Edition Chinese experts express concerns over a possible new round of quantitative easing monetary policies by the United States. US attorney-general says investigation is on
2011CRI中国国际广播电台
Did you ever dream of digging a hole so deep it came out the other side of the earth? Let's play that game again, using a little physics. First we have to imagine that our tunnel is lined with super-heat-resistant material so we can pass through laye
英语时差8，16
Last time we imagined a tunnel through the center of the earth. If such a thing existed, you could step into one end, fall all the way to the other side, and step out. Gravity would cause you to pick up almost exactly as much speed on the way down as
英语时差8，16
Zippy Aliens 爱因斯坦的狭义相对论认为物体的运动速度越接近光速，时间越慢。在1971年，物理学家理查德基廷和乔伊哈夫勒验证了这个假想。他们将4个极为精确的原子钟放在一架普通航行的飞
英语听力文摘 English Digest
The Front End of the Earth 火流星看上去非常明亮，像条闪闪发光的巨大火龙，发着沙沙的响声，有时还有爆炸声。有的火流星甚至在白天也能看到。火流星的出现是因为它的流星体质量较大(质量大
英语听力文摘 English Digest