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

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Now, sixty five million years later, cutting-edge imaging technology lets us look deep inside their bodies to reveal just how the world’s greatest carnivores really work. Dinosaurs¹ arm themselves with the most advanced weaponry nature has ever unleashed², tools that allow them to survive for over 100 million years. 

 

North America, 115 million years ago, reptilian³ creatures have evolved into killing⁴ machines. Death is everywhere, sweeping⁵ down from the air, stalking the forest, and sometimes thundering through the trees in the form of Tyrannosaurus Rex. 

 

T-Rex was the ultimate predator⁶ in the history of terrestrial animals. 

 

T-Rex is one of the largest and deadliest animals ever to walk on two legs. For 2 million years, it rules the American West. Powerful and intelligent, this predator is equipped with the tools to bring down massive and well-armed prey⁷. 

 

The head, the skull⁸ of T-Rex is awesomely⁹ large. 

 

And each tooth is an armor-crushing weapon.

 

Tyrannosaurus Rex means tyrant¹⁰ lizard¹¹ king. This alfa predator is 12 meters long, 5.5 meters tall and weighs 6 tons. 

 

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