单词：cervicogenic
单词：cervicogenic 相关文章
These holes are the unmistakable hallmark of a violent death. Their shape suggest they were made by the teeth of a big cat, but which one? Today theres only one large cat in the region, the Florida panther. Though similar to the cougar at the western
探索与发现2012年
But how did one man and a spear produce the huge force behind this blow? The answer lies with small bits of ivory like this. They were once part of an atlatl, or spear thrower. An atlatl acts as a sort of catapult, magnifying the strength of a hunter
探索与发现2012年
By piecing together the evidence these creatures left behind, we can build a picture of this sub-tropical corner of the continent as it was 13,000 years ago. While most of North America was still in the grip of the Big Freeze, Florida was an ice age
探索与发现2012年
This is Florida, a taste of the tropical, one of the world's most popular holiday destinations. Here mankind's unquenchable desire to explore and colonise reaches astronomical proportions. Eight, seven, six, five, four, three, two, one. Ignition. Lif
探索与发现2012年
This creates steam in oasis and a profusion of life. Today, these warm springs are a refuge for one of Florida's most tropical inhabitants. The West Indian Manatee wasn't present during the last ice age, but returned here as the waters warmed up. Eve
探索与发现2012年
This is the VOA Special English Health Report. Sometimes new health advice conflicts with old advice. Yet new guidelines last week for breast cancer testing in the United States created a storm of debate. The advice came from experts who are appoint
VOA慢速英语2009年（十一）月
Online Classes May Force Changes at Universities This is pretty amazing, said the University of Virginia's David Evans, teaching an online introduction to Computer Science. Online classes are now taught by many top universities and offer everything f
VOA标准英语2013年(六月)
This triggered other dramatic changes. As sea levels dropped, so did the inland water tables. Florida's fresh water drained away through the porous limestone rock. Pools dried up and springs diminished. Florida was on the brink of drought. And animal
探索与发现2013年
Could it be that drastic water shortage was the reason for the mastodons' epic migrations? Another big piece of this puzzle lies far out to sea. This is the ocean floor. But this isn't rock sprouting out at the bottom. It's wood. It's the remains of
探索与发现2013年
But despite their name, the mighty Everglades did not exist during the ice age. So what did pre-historic Florida look like? There is one place in northern Florida that has revealed more ice age secrets than almost anywhere else, the dark slow-moving
探索与发现2013年
The cold climate conifer forests of the north displaced broadleaved woodlands. Plants and animals were gradually pushed south to find a warmer climate. Florida became a refuge from the cold. Down here is where the Ice Age north met the subtropical so
探索与发现2013年
By Dan Robinson Capitol Hill 18 May 2006 U.S. officials say implementing the Darfur peace agreement requires sustained international attention to Sudan in coming months. A congressional hearing examin
2006年VOA标准英语（五月）
By Alan Silverman Hollywood 02 April 2006 It's back to prehistoric times for a sequel to the 2002 computer-animated family film that featured a grumpy mammoth and his traveling companions: a quick-wit
2006年VOA标准英语（四月）
Ocean Floor Reveals Past Climate Changes Time capsule Lamont research professor Maureen Raymo, the director of the Core Repository, slides open a long, narrow drawer from the cabinet. Like thousands of others here, the drawer contains a long, thin cy
VOA标准英语2012年(一月)
Supernatural Romance, Action Attract All Ages In the Houston suburb of Tomball, these women get together frequently to socialize and chat about the books they are reading. Cathy Clark says many of those books - targeted at teens - also attract adult
VOA标准英语2012年(三月)
The Science of Climate Change Climate negotiators are meeting in Durban, South Africa beginning from November 28-December 9 to discuss the planet's changing climate. The first decade of this century was the hottest on record. Polar ice is melting. Gl
VOA标准英语2011年(十一月)
By Peter Heinlein Washignton 15 September 2006 George Clooney (left) and Elie Wiesel Actor George Clooney and Nobel laureate Elie Wiesel have met with the U.N. Security Council to plead for prompt action to save lives in Darfur. The Oscar-winning fi
2006年VOA标准英语（九月）
Though very powerful, shes not a sprinter and she needs to get close to her prey before she strikes. This time shes run too soon and its a fruitless chase. Then her attention is diverted to a slower-moving target, slow but not defenseless. She backs
探索与发现2013年
SCIENCE IN THE NEWS - November 12, 2002: Oldest Evidence of Jesus? / Mapping Genes that Cause Disease / 2002 World Health Report VOICE ONE: This is Steve Ember. VOICE TWO: And this is Bob Doughty with
科技之光
By Lisa Schlein Geneva 10 November 2006 The U.N. refugee agency says inter-ethnic violence is increasing in eastern Chad. It says an interagency mission reports a recent spate of attacks in the Kerfi area, southwest of Goz Beida, has also extended t
2006年VOA标准英语（十一月)