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With Camarasaurus, it's operating purely by instinct.
對于圓頂龍它完全靠本能行動。
They also discovered that the Camarasaurus would have sent out a distress call which Allosaurus would pick up and recognize.
人們還發現圓頂龍會發出求救呼號而異特龍能夠聽到并辨識出來。
This cat-scan evidence coupled with contemporary insight into predatory dinosaur behavior,
這個CAT掃描證據加上利用當代情況分析出的掠食性恐龍行為，
has allowed experts to formulate this scenario in which the dominant predator takes on the largest of dinosaurs.
讓專家們能夠構建出一個場景，占統治地位的掠食者對最大的恐龍發動進攻。
Their sheer size and mass is usually enough to deter any predator from attacking, but the large number of predators assembled in this one area puts the Camarasaurus on high alert.
它們的體型和重量一般能夠嚇退任何進攻者，不過在這個區域集結的大量掠食者還是讓圓頂龍高度警惕。
Despite the threat, quenching their thirst is a priority.
盡管有威脅解渴對它們來說更為重要。
The alpha male steps out onto the mud encrusted shore.
領頭雄性走上了蓋著泥殼的湖岸。
As he positions himself to get a drink, he finds it difficult to move.
當它嘗試要去喝水時發現自己很難移動。
This puts the dinosaur in a very precarious position if it happens to get attacked.
如果圓頂龍在這時遭到攻擊它會處于非常危險的境地。
Unfortunately for this sauropod, it's unaware of the mud trap that lies just beneath the cracked and dry upper crust.
這頭蜥腳類恐龍很不幸，它沒有注意到這個爛泥陷阱就藏在干硬開裂的表層之下。
His enormous weight cracks through the dried mud layer.
巨大的重量壓碎了泥土表面的硬殼。
Its elephant-like front feet become stuck.
它大象般的前腳陷了進去。
Each time it tries to pull its legs free, it sinks even further.
它每次嘗試把腿拔出來都會陷得更深。
The Camarasaurus begins to panic and bellows a distress call.
圓頂龍開始發慌發出了求救叫聲。
The Allosaurus pick it up one hundred meters away.
一百米外的異特龍聽到了叫聲。
