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By Deborah Tate Capitol Hill 26 May 2006 General Michael Hayden (file photo) The U.S. Senate has confirmed General Michael Hayden as the director of the Central Intelligence Agency, CIA, despite concerns about a surveillance program he led while hea
2006年VOA标准英语（五月）
By Greg Flakus Houston 21 May 2006 Mayor Ray Nagin speaks to his supporters at his victory party in New Orleans, May 20, 2006 Appearing before cheering supporters, Mayor Ray Nagin thanked them and the
2006年VOA标准英语（五月）
By Joe Bavier Abidjan 28 March 2006 Compound of the house where former Liberian warlord Charles Taylor lives near the sea side town of Calaber Exiled Liberian warlord-turned-president Charles Taylor h
2006年VOA标准英语（三月）
By Joe Bavier Abidjan 27 March 2006 Compound of the house where former Liberian warlord Charles Taylor lives near the sea side town of Calaber Supporters close to deposed Liberian leader Charles Taylo
2006年VOA标准英语（三月）
A mayor offering services in different languages to his multi-ethnic community may not sound like anything out of the ordinary. But in Turkey the local mayor in city of Diyarbakir was dismissed and is possibly facing prison for speaking Kurdish. Abd
VOA标准英语2008年（七月）
By Kate Thomas Dakar 23 September 2009 Former Liberian President Charles Taylor sits in the courtroom of the International Criminal Court prior to the beginning of his defense case during his trial in The Hague, 13 Jul 2009 Former Liberian President
VOA标准英语2009年(九月)
Scotty McCreery's Future Career Looks 'Clear As Day' American Idol 2011 winner Scotty McCreery has just released his debut album and he's already setting records. Clear As Day is the debut album by Country singer Scotty McCreery. With first-week sale
VOA标准英语2011年(十一月)
Numbers at 18-Yr. High as UN Observes World Refugee Day Four-year-old Shahad laughs and jokes with her older sister in their makeshift home. She appears a happy, young girl; but the scars and burn marks on her smiling face tell the story of her begin
VOA标准英语2013年(六月)
By Paige Kollock London 07 June 2007 When big city mayors, business leaders, and environmentalists gathered recently in New York City to discuss climate change, at the heart of their talks was the effects of carbon emissions on the environment. Paige
2007年VOA标准英语（六月）
And every faint smudge of light you are looking at is a galaxy. For Richard Ellis, it's a galactic treasure trove. So much like an archaeologist/, we piece together history by digging into deeper and deeper layers. So a cosmologist like myself, uses
自然百科2011年
A new galaxy is formed where, instead of the discs that the original galaxies have, where all the stars are going around more or less on a plane. Instead the stars are going every which way just like the elliptical galaxies that we see. And so we are
自然百科2011年
The first stars in our Milky Way were fearsome high-octane stars, burning their hydrogen fuel at tremendous rates, rushing through their life cycle. They like the rockslides. They live fast and die young. They run out of their fuel very quickly and e
自然百科2011年
But our time traveling isnt yet over. There is still the question of how the first galaxies kindled the very first stars. We are on a journey visiting the Dark Ages, a time over 12.5 billion years ago. The sight is spectacular. The sky is ablaze with
自然百科2011年
Imagine the disc of our galaxy, if you just took a disc of stars and put it there, gravity would tend to make this disc collapse/ into itself and it would immediately just fall together. That is not what we see with the galaxy. Whats actually going o
自然百科2011年
Its a stunning location, but its also mysterious. These stars are not just close together. They are on the move at enormous speeds. Going to the heart of a galaxy might not be the similar to going to an amusement park. The rides are some similar to h
自然百科2011年
Each tag is whipping around the center of the galaxy, the particular, the most striking thing you will notice is the motion of SO2.So SO2 goes on an incredible roller-coaster ride. It comes whipping around and then back out. Something with tremendous
自然百科2011年
The glowing region is the accretion disc, star debris falling inward, would turn round in the maelstrom heated by frictions to such high temperatures that it glows white hot. So at the center of our galaxy, we do have a black hole. We now know that t
自然百科2011年
Like nebulae which spawn stars, it is made of gas and dust. But that's where most similarities end. For Alex Filippenko, it represents an intriguing industrial zone within our galaxy where the elements from which our world is made or manufactured. Wh
自然百科2011年
We are taking a ride through the Milky Way. First, we are traveling to a place where stars are born. Even at the speed of light, 196,000 miles a second, the journey lasts for 1,500 years. We've arrived at the vast glowing cloud of gas and dust, the g
自然百科2011年
Like nebulae which spawn stars, it is made of gas and dust. But that's where most similarities end. For Alex Filippenko, it represents an intriguing industrial zone within our galaxy where the elements from which our world is made or manufactured. Wh
自然百科2011年