标签：EarthSky 相关文章
The Earth's Biggest Threat 地球危机──温室效应 by Levi King Global warming was once considered unlikely to be real. Recently, though, it has become widely accepted as fact. Scientists have calculated that the earth's atmosphere has gotten
常春藤解析英语
[00:00.00] UNIT 3 Lesson nine [00:04.88]new words and expression [00:09.14]Mount [00:10.48]n.山 [00:11.81]Mount Qomolangma [00:13.58]珠穆朗玛峰 [00:15.36]ocean [00:16.68]n.海洋 [00:18.00]Paciffic Ocean [00:19.62]太平洋 [00:21.24]north-west
广州初中2A
New Earth-Size Planet Found 地球大小的新行星被发现 Not too big, not too small. Not too hot, not too cold. A newly discovered planet looks just right for life as we know it, according to an international group of astronomers. 不太大又不太
VOA标准英语2014年(四月)
By Phil Mercer Sydney 29 March 2008 Australians switched off their lights for 60 minutes Saturday to mark Earth Hour, a campaign by environmentalists to raise awareness about global warming. The event was started a year ago in Sydney by the World Wil
VOA标准英语2008年（三月）
This Is America - Pictures Connect People for Earth Day 2013 From VOA Learning English, welcome to This Is America. I'm Kelly Jean Kelly. And I'm Mario Ritter. April twenty-second is Earth Day. Former United States Senator Gaylord Nelson started the
2013年VOA慢速英语(四)月
Economics Report - Limits on Rare Earth Exports Get China in Trade Dispute 经济报道 - 稀土限制使得中国陷入贸易纠纷 This is the VOA Special English Economics Report. 这里是美国之音慢速英语经济报道。 The United States,
2012年VOA慢速英语(三)月
By Paul Sisco Washington, D.C. 24 November 2006 watch Polar Melting report 2007 is International Polar Year. It's an international effort to spur scientific research at the most forbidding places on Earth, primarily because many in science consider
2006年VOA标准英语（十一月)
By Joseph Mok and Wang Yiru Washington, DC 25 July 2006 watch Red Earth Festival report The 20th Red Earth Native American Cultural Festival was held last month in Oklahoma City, in the western United States. The festival's art and dance competition
2006年VOA标准英语（七月）
A week-long Earth Day celebration has ended in Washington, D.C. The Earth Day Network hosted performances and information sessions to show people how to conserve natural resources and keep their communities clean. For the past week people gathered on
VOA标准英语2010年(四)月
STEVE INSKEEP, HOST: We have news this morning about the origin of life. The news is about just how hard it is to find that news. NPR's Rae Ellen Bichell reports. RAE ELLEN BICHELL, BYLINE: Things get hairy when you go looking for the earliest forms
2017年NPR美国国家公共电台3月
AUDIE CORNISH, HOST: Today, scientists announced a big discovery around a star in the constellation Aquarius - seven planets about the size of Earth. And as NPR's Nell Greenfieldboyce reports, they're most likely rocky planets that could be cozy enou
2017年NPR美国国家公共电台2月
If you woke pup this morning with more health than illnessyou are more blessed than the million who will not survive this week. 如果你早上醒来的时候健康无恙那么，比起活不过这一周的百万人来说，你真是幸运多了。 If you have never experienced the danger
白领英语晨读
By Paul Sisco Washington, DC 07 July 2006 watch Asteroid report A major asteroid passed by the Earth this week, and another is heading this way. An asteroid visible in the night sky Asteroids are similar to comets and meteors. But they are larger, m
2006年VOA标准英语（七月）
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
2006年VOA标准英语（七月）
By Phil Mercer Sydney 01 April 2007 Difference of switching many of the city's lights is shown in this combo taken one week apart in Sydney, on 24 Mar 2007, above, and 31 Mar 2007, below Parts of Australia's biggest city, Sydney, plunged into near da
2007年VOA标准英语（四月）
The solar system is a hostile place. Earth is under attack from deadly cosmic radiation. Life here is only possible, because it's protected by the magnetosphere, an invisible force field that cocoons the planet. But new evidence reveals that this vit
自然百科2011年
As the reversal approaches, the decay of our magnetic field will continue and cosmic radiation will get increasingly close to the Earth's surface. As the reversal approaches, the decay of our magnetic field will continue and cosmic radiation will get
自然百科2011年
We drive them about 20 miles away to the North, and release them, and we track them as they try to fly back home. We drive them about 20 miles away to the North, and release them, and we track them as they try to fly back home. Hes up, OK. Holland wa
自然百科2011年
By analyzing different samples of lava, Herrero / Bervera has built up a picture of how the filed has changed since long before humans were around. They are actually the recorders of the Earth's magnetic field in hundreds of years, thousands of years
自然百科2011年
Blockson's computer model reveals that at the South Atlantic Anomaly, the magnetic field isn't just weaker than anywhere else on the planet. It's actually reversed polarity. There is a patch on the core in the South Atlantic where things are not poin
自然百科2011年