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Utahraptors stayed on the migration routes of the herbivores, lying in wait for their unsuspected prey.
猶他盜龍埋伏在植食動物遷徙的必經之路上，躺著等它未知的獵物。
Utahraptor may have been more of an ambush predator.
猶他盜龍可能更像是伏擊性掠食者。
In other words, we might say that a Velociraptor was a cheetah running things down, that Utahraptor may have been the equivalent of a lion in the sense that it may have laid and waited for prey and with a quick, short burst of speed, take in something, but it wasn't an animal that probably runs things down over a long distance.
換一句話說的話，我們可能會說伶盜龍像獵豹一樣奔襲獵物，而猶他盜龍可能更像獅子會埋伏起來等待獵物靠迅速的短距離沖刺來捕獲獵物，但它可能并不會依靠長距離奔跑來狩獵。
Utahraptor was fast, but the cooling climate favored even faster, smaller models.
猶他盜龍速度很快，不過變冷的氣候青睞更加迅捷小巧的型號。
Future Raptors would evolve to stand just over a meter high.
未來的迅猛龍將進化到站起來只有一米多高。
They would rely more on agility and cunning than brute strength and they would render the Utahraptor obsolete.
它們將更依賴敏捷和狡黠而不是蠻力，它們將致使猶他盜龍被淘汰。
Found halfway around the globe, another killer was perfectly suited to his environment.
在半個地球之外，人們發現了另一種完美適應環境的殺手。
It was the apex predator of his territory and it's often called "the T-Rex of the East".
它是那片領地上的頂級掠食者，經常本稱作“東方霸王龍”。
70 million years ago, the earth was cooling.
七千萬年前，地球正在變冷。
Ice caps formed at the poles and winters were becoming harsher with temperatures dropping to near freezing.
極地開始形成冰蓋，冬季變得更加嚴酷氣溫降到了冰點左右。
Those temperatures would seem relatively warm by today's standards.
那些溫度按今天的標準來看好像還比較溫暖。
But for life in the Cretaceous period, it was much colder than anything the dinosaurs were used to.
不過對于白堊紀時期的生命，這可比恐龍們經歷過的任何時候都要寒冷。
The Cretaceous period was much cooler than that of the Jurassic that preceded it.
白堊紀時期遠比之前的侏羅紀時期更加寒冷。
Well, this was all due to the break-up of Pangaea, and then ultimately Gondwana and Laurasia.
這都是因為泛大陸的分裂，最終形成了瓦納古陸和勞亞古陸。
The sea levels rose and fell, the jet streams and the atmosphere were altered, and currents in the ocean were effected.
海平面升高又降下，噴射流和大氣都被改變了，海洋中的洋流也受到了影響。
The life that was hit the hardest was that lived on the smaller landmasses.
受到最大打擊的生命是生活在較小陸塊之上的那些。
Well, larger areas have more buffer than smaller ones when it comes to climate change.
在氣候發生變化時，較大的區域比較小的多了緩沖空間。
In what's now North America, the larger Allosaurus had given way to the smaller Raptors.
在如今的北美洲上，較大的異特龍讓位給了較小的迅猛龍。
Off the west coast of Africa, on the island of Madagascar, another smaller-sized improvement on Allosaurus became its biggest killer,referred to as the T-Rex of the East.
在非洲西海岸之外，馬達加斯加島上，另一種較小的異特龍改進版成了那里最大的殺手，被稱作東方的霸王龍。
Its name was Majungasaurus.
它的名字是瑪君龍。
