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  • 英语听力:2013-05-22 完美捕食 Perfect Predators —9

    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...

  • 英语听力:2013-05-19 完美捕食 Perfect Predators —8

    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...

  • 英语听力:2013-05-17 完美捕食 Perfect Predators —7

    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,...

  • 英语听力:2013-05-15 完美捕食 Perfect Predators —6

    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...

  • 英语听力:2013-05-12 完美捕食 Perfect Predators —5

    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...

  • 英语听力:2013-05-10 完美捕食 Perfect Predators —4

    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...

  • 英语听力:2013-05-08 完美捕食 Perfect Predators —3

    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...

  • 英语听力:2013-05-05 完美捕食 Perfect Predators —2

    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-...

  • 英语听力:2013-05-03 完美捕食 Perfect Predators —1

    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...

  • 国家地理:Predators behind bars 监狱生死门: 牢笼恶兽

    Albert has been a Crip since age 12. He is one of the first generations of the Los Angeles based Gang, a group known as the Original Baby Gangsters. His seniority puts him near the top of the Crips' national hierarchy. Here in Lebanon, he runs a crim...

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