单词:ST_space_centres-of-objects
单词:ST_space_centres-of-objects 相关文章
04 美国的航空航天技术 DATE=2-21-01 TITLE=EXPLORATIONS #1940 - Space Digest BYLINE=Paul Thompson VOICE ONE: This is Steve Ember. VOICE TWO: And this is Shirley Griffith with the VOA Special En
EXPLORATIONS -February 6, 2002: Increasing Hubble’s Power By Paul Thompson VOICE ONE: This is Steve Ember. VOICE TWO: And this is Bob Doughty with the VOA Special English program EXPLORATIONS. Today
Scientists Deliberate Cleaning Space Junk WASHINGTON Everything that we launch into an orbit around the earth eventually becomes space debris. Scientists say the increasing number of unusable objects circling our planet is threatening functioning sat
Lesson30 Spin-off Technology Some people wonder why countries spend millions of dollars on space projects. They want to know how space research helps people on Earth. Actually space technology helps people on Earth every day. This is called spin-off
The Pentagon plans to shoot down a disabled spy satellite to prevent a potential deadly gas leak, officials said. Upon notification of the descending NRO satellite, the President and his national and homeland security advisors reviewed the options a
Volume 体积 Volume is how much space something occupies. 体积是指某一物体所占的空间。 In this case, space consists of three dimensions, length, width and height. 这样的话,空间由长、宽和高这三维组成。 Volume is pres
Why Do Stars Twinkle? If youve ever glanced skyward on a clear evening, youve probably noticed with some wonderment the sheer numbers of stars. Some are tiny, barely visible points. Others radiate strong white light. And from our earthly vantage poin
Westminster Abbey is one of the most famous tourist sites in Britains capital, London. Now, officials have decided to open another area of the building to help teach its history. The Queens Diamond Jubilee Galleries are about 16 meters above the floo
(THEME) VOICE ONE: This is Nicole Nichols. VOICE TWO: And this is Steve Ember with the VOA Special English program EXPLORATIONS. Today we tell about discoveries of the past on the island of Saint John, in the United States Virgin Islands. Saint John
New Robotic Arm Can Grasp Moving Objects An international team of engineers based in Switzerland built a robotic arm that learned to perform complex movements. The term robotic arm covers a variety of mechanical devices from robots that weld automoti
Every year satellites are damaged or destroyed by objects orbiting the Earth's atmosphere. An Australian company is now using the latest laser technology to track these objects in order to reduce cosmic damage. Li Dong has the details. Even in space,
By Mike O'Sullivan Los Angeles 03 July 2006 A large asteroid, known as 2004 XP14, raced past the Earth early Monday. Scientists say it posed no threat to the planet, but serves as a reminder of the hazards encountered in space. -------- The rocky sp
74 空气与空间博物馆落成二十五周年纪念日 DATE=7-23-01 TITLE=THIS IS AMERICA #1074 - Air and Space Museum Birthday BYLINE=Jill Moss VOICE ONE: This year, the National Air and Space Mus
Tim has developed a map to visualize their location. And on that map, the most important are the Near-Earth asteroids, the ones closest to the planet. On the screen here is a map of the solar system. And Ive got the Sun in the centre and the third pl
The amount of debris orbiting the Earth has reached a tipping point for collisions, which would in turn generate more of the debris that threatens astronauts and satellites, according to a US study released on Thursday。 NASA needs a new strategic p
By Alex Villarreal Washington 25 October 2007 The U.S. space shuttle Discovery has docked at the International Space Station, marking the next phase in a complex mission to expand the international orbiter. VOA's Alex Villarreal reports from Washingt
Making Contact 为什么戴隐形眼镜看东西更清楚? Don:I get contact lenses to replace my glasses and its like Im seeing the world through new eyes. Its miraculous ! Yal: Acutlly, Don, there is nothing miraculous about it. D: Who tell? Y: W
Sure, you think the world is full of solid objects. You think the radio youre listening to is solid. You think the floor youre standing on or the chair youre sitting in is solid. Heck, you probably think that you yourself are a solid object. Wrong. O
What Came First, Language or Perception? Have you ever wondered what came first? Language or perception? Find out on this Moment of Science. Yael: Down,what came first? Language or Perception? Down:Hey!Is this one of those questions with no answer? Y