单词：hundredaghte
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By Steve Baragona Washington 29 October 2009 Garden pest As farmers across the United States are bringing in the harvest, silos are filling up with record or near-record quantities of corn and soybeans. To an extent not seen anywhere else in the wor
VOA标准英语2009年(十月)
More than a hundrand and thirty thousand troops from 50 different countries are currently in Afghanistan. But you just heard Prime Minister Julia Gilos say most of Australian forces could be leaving Afghanistan soon. Right now there're around 1500 Au
CNN2012年(四)月
By Heda Bayron Hong Kong 17 February 2006 Mudslides triggered by heavy rains have buried a village in the eastern Philippines. At least 15 bodies have been recovered. The Red Cross says hundreds are m
2006年VOA标准英语（二月）
A major independent research institute has issued a report calling for urgent and significant changes in U.S. military strategy toward Afghanistan. The call comes just as President Obama has launched his own strategy review, and as NATO defense mini
VOA标准英语2009年(二月)
Thats what it wants to hear, because that sound is gonna mean thats where lunch is. A battle with Triceratops is more often than not a fight to the death. This herbivore has evolved into a tank. Now, as a Tyrannosaur specialist, I dont like to admit
探索与发现2013年
Tyrannosaurus Rex was of ten thousand pound, self-propelled, antitank weapon. Now, sixty five million years later, cutting-edge imaging technology lets us look deep inside their bodies to reveal just how the worlds greatest carnivores really work. Di
探索与发现2013年
The jaws of T-Rex are infamous and lethal, housing sixty teeth with some as long as 30 centimeters. Its skull is constructed of 64 bones designed to be light but strong. Its 16 times stronger than the jaws of an alligator. The front teeth are dagger-
探索与发现2013年
Triceratops protects itself with a bony shield called a frill. They can fend off an attacker with a pair of one-meter-long swords. Youve got to crush it. The only way to deal with this huge, curved, cantilevered, composite armor is a crushing blow wi
探索与发现2013年
Its unlike any other creature that has walked the planet. T-Rex is different. Something about Tyrannosaurs and Tyrannosaurus Rex itself is different than other predatory dinosaurs. But for such a celebrated killer able to take on the toughest creatur
探索与发现2013年
Hearing, smell and sight are all well refined. We can look at the sense of vision and see the attributes of a predator. T-Rexs eyes are 40 centimetres apart providing exceptional binocular vision, the ability to perceive depth. An eye is essentially
探索与发现2013年
Sauroposeidon towers over Deinonychus. In fact, its mammoth size is its primary defense. But this giant begins life very small. For Deinonychus, Sauroposeiden would be a great meal, at least the juveniles, because there wouldve been lots of them and
探索与发现2013年
And Sauroposeidon like most plant eaters are smelly. Unlike a meat eater, they produce huge amounts of waste, feces that form a trail marking everywhere theyve been. For Deinonychus, that odor is a dead giveaway. And this carnivores eyes can clearly
探索与发现2013年
They are actually increasing their chance of getting a meal. Its a strategy still used today. Working together, lions will take on prey as big as a four-ton elephant, and they only have teeth and claws. Deinonychus employs an array of weaponry more p
探索与发现2013年
Deinonychus instinctively knows to go for this giants weak spot, its neck. Youve got the windpipe there. Youve got the jugular vein, which if opened up will mean that that Sauroposeidon is dead meat. But death does not come quickly or pleasantly. For
探索与发现2013年
Attacking another T-Rex may seem like suicide, but a creature with such a voracious appetite has to find food by any means. Cannibalism is the rule. Its not the exception. If youre a carnivore and theres meat there, you take advantage of it. In fact,
探索与发现2013年
Nothing this large would achieve powered flight until the 20th century, 65 million years later. And Quetzalcoatlus still may hold the record for flight duration. Probably stay aloft for a week. Probably it could have gone for 25, 26,000 miles in a si
探索与发现2013年
Other carnivores are even more dependent on cognitive thought. For protection, Deinonychus relies primarily on its brain. --The brain structure of Deinonychus and its role are just really quite remarkable. Relatively speaking, Deinonychus has one of
探索与发现2013年
Mighty carnivores ruled a dangerous world in the Cretaceous Period. But being a super predator like Tyrannosaurus Rex is not easy. Just surviving to adulthood is a major feat, one that takes a decade or more of killing and eating some of the meanest
探索与发现2013年
By Lisa Schlein Geneva 01 February 2008 The U.N. refugee agency reports more than 40 staff and aid workers from private organizations have been withdrawn from the Eastern Chad town of Guereda following a series of armed attacks in the area. The aid w
VOA常速英语2008年（二月）
By Phuong Tran Dakar 17 January 2007 A South African television company is choosing contestants for its new audience participation and reality television music show, Idols West Africa . Auditions are under way for a music competition series that comb
2007年VOA标准英语（一月）