VOA标准英语2009年-Tensions Threaten Kenya's Fragile Coalition Gov

Kenya's fragile eight-month-old coalition government is in deep crisis amid accusations that President Mwai Kibaki is trying to sideline and undermine the authority of the Prime Minister Raila Odinga. Months of tension between the two leaders peaked

VOA标准英语2009年-Al-Shabab Group Threatens More Terror Attacks i

Somalia's militant al-Shabab group has promised to launch more attacks against African Union peacekeeping troops a day after 11 soldiers from Burundi were killed in blasts claimed by the group. On an Internet website, al-Shabab posted pictures of th

VOA标准英语2011--Conrad Pope Tells Marilyn Monroe Story Through Music

Conrad Pope Tells Marilyn Monroe Story Through Music The new film My Week with Marilyn tells the story of a week in the life of the legendary film star Marilyn Monroe, who in the 1950s was in Britain making a film with the iconic actor Laurence Olivi

VOA标准英语2011--India Seeks to Counter Internal Terroris

IndiaSeekstoCounterInternalTerroristThreat Top Indian officials say they need to prepare for terrorism threats that may arise both within and outside the country. Indian Home Minister P. Chidambaram on Thursday described recent terror attacks on Indi

VOA标准英语2013--US Offers $10 Billion Weapons Package to Counter Iran Threats

US Offers $10 Billion Weapons Package to Counter Iran Threats Secretary Hagel's visit to Israel could have been awkward. He was accused of being anti-Israel during his nomination hearing. But he got a warm welcome as did the weapons package he took w

VOA标准英语2013--Kenya Real Estate Boom Threatens Prime Farmland

Kenya Real Estate Boom Threatens Prime Farmland There is a booming housing market from Ghana to Nigeria to Kenya. More and more Africans are moving to major cities like Nairobi to earn a living, and they are looking for housing. They are the driving

VOA标准英语2013--Polls in Pakistan’s Baluchistan Province Face Multiple Threats

Polls in Pakistans Baluchistan Province Face Multiple Threats In recent months in Baluchistan, multiple bomb and grenade attacks, shootings and threats of violence, have meant few large political rallies during campaign season. A bomb blast earlier t

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—29

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

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—32

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

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—28

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

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—27

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

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—21

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

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—14

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

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—15

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

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—16

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

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—9

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

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—5

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

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—8

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

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—12

We are at a foundry here, and they are pouring molten iron from all machinery. And they are going to make parts for new machines out of that iron, so they are recycling yet, but all that iron was created and ejected into the cosmos by gigantic stars

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—13

In about four or five billion years, it will grow into a much bigger star, a star called a red giant. And that outer atmosphere of gases will be held so loosely by the sun at that time that the gases will be blown away gently in what I call a cosmic