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Tyrannosaurus-Rex may have ruled the Cretaceous, but Allosaurus was the king of Jurassic.
霸王龍也許統治了白堊紀，但異特龍才是侏羅紀的王者。
While any environment that we have on earth today we have a top predator, Allosaurus was the top predator of the late Jurassic in western North America.
在地球上的任何環境里都有一種頂級掠食者，異特龍是侏羅紀晚期北美西部的頂級掠食者。
Here in Alaska, you've got the brown bear, up in Arctic Alaska, polar bear, Africa, Serengeti, the lion, and if you're in India, the tiger.
在阿拉斯加，是棕熊，在阿拉斯加的極地區，是北極熊，非洲的塞倫蓋提，是獅子，要是在印度，就是老虎。
And in western North America, it was Allosaurus.
在北美西部，那時候就是異特龍。
It had powerful jaws with pretty sharp teeth.
它的雙顎有力，牙齒非常鋒利。
It had extremely large claws on its hand which were very useful for gripping and tearing.
它前肢的爪子非常大，對抓住和撕扯獵物是很有用的。
For nearly 20 million years, Ceratosaurus had dominated the region of North America where the Rocky Mountain states are now.
近兩千萬年里，角鼻龍統治著北美地區就是現在的落基山區。
But the emergence of Allosaurus, a bigger, faster, stronger adversary, changed everything.
但是更大、更快、更壯的對手異特龍的出現，改變了一切。
What made Allosaurus unique was its build.
讓異特龍出類拔萃的是它的體型。
It was much more powerful than other predators of the late Jurassic era, including Ceratosaurus which it dwarfed.
它要比侏羅紀晚期其它的掠食者強大得多，也包括與它相形見絀的角鼻龍。
Allosaurus was one of the largest predatory dinosaurs in North America at the end of Jurassic.
異特龍是侏羅紀晚期北美地區最大的掠食恐龍之一。
He ultimately displaced Ceratosaurus as being the apex predator.
它最終取代了角鼻龍成為了頂級掠食者。
You were face to face with Allosaurus.
你要是面對面地碰到異特龍。
First of all, you'd be in big trouble.
首先，你麻煩大了。
Guess the first thing, you'd turn around and run.
猜首先你會轉身就跑。
By the time you did, he would have foot planted on you, planting you face first into the mud, and would reach down, grab on, brace himself, and basically chop you in half.
你跑掉時候，它會一腳把你踩住，讓你臉朝下摔進泥里，然后彎腰，咬住你，撐住自己，而且基本上會把你撕成兩半。
For the bite force, probably comparable to a great white shark.
它的咬合力，應該可以媲美大白鯊。
Allosaurus had considerable improvements on the Ceratosaurus.
異特龍要比角鼻龍進步很多。
Its size was unprecedented for its time.
它的體型就前所未有。
Measuring about 10 meters long, 4 and a half meters tall and weighing up to 5 tons.
有大概十米長，四米半高，重可達五噸。
Allosaurus was the size of a railway carriage.
異特龍的大小相當于一節火車車廂。
When the first big skeletons of Allosaurus were uncovered, people finally saw that there were meat eating dinosaurs that was as big as killing whale with powerful claws on its hand.
當第一具異特龍的巨大骨架被發現時，人們終于看到了這種食肉恐龍，跟虎鯨一樣巨大前爪非常發達。
Truly, a terror from the Jurassic period.
這可真是侏羅紀時期的兇神惡煞。
One social characteristic made Allosaurus even more dangerous.
異特龍的一個社會屬性使之更為危險。
Ongoing research suggests they lived in packs.
持續的研究表明它們群居生活。
