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For Deinonychus, Sauroposeidon would be a great meal, at least the juveniles,
對恐爪龍來說波塞東龍是一頓大餐，至少它們的幼崽是的。
because there would've been lots of them and because they would've been effectively defenseless.
因為它們數量繁多而且幾乎毫無防備。
When Sauroposeidon reaches full size at around 25 years old, nothing can compete it.
待波塞東龍長至二十五歲完全發育后，便沒有什么能與之匹敵了。
But this Goliath starts out about the size of a house cat.
但是這只巨獸始于家貓大小。
When these eggs hatch, the young grow fast. But not fast enough.
這些蛋孵化后，幼龍迅速成長。但仍然不夠快。
They won't even reach a ton in weight for at least three years,
它們甚至三年后還長不到一噸重，
giving the Raptor Dinosaurs plenty of time to attack.
這給了猛禽類恐龍充足的攻擊時間。
There's good evidence that Deinonychus killed animals that weighed 10 times as much as it.
有充分證據證明，恐爪龍能殺死體重十倍于己的動物。
And 10 times Deinonychus' weight in raw meat is one big meal.
十倍于自身體重的生肉可算是一頓盛宴了。
They could probably feast for a while on, say, a three-year-old Sauroposeidon, an animal the size of a hippo.
一只河馬那么大的三歲的波塞冬龍，足夠它們吃上一段時間了。
Bringing down an animal 10 times your size takes more than just brains. It requires highly advanced senses.
要擊倒比體重十倍于己的動物需要的不僅僅是頭腦。還需要高度發達的感官。
We can tell that it had a good sense of vision, good hearing, and a pretty good sense of smell.
我們可以知道，它視覺和聽覺都很敏銳嗅覺也非常不錯。
In fact, like few carnivores of its day, Deinonychus has a sense of smell so acute,
事實上，與當時的大多食肉動物不同，恐爪龍的嗅覺異常靈敏，
it can track prey in the dead of night.
即使在深夜也能追蹤到獵物。
Inside the snout are two nasal passages.
鼻孔內有兩條鼻道。
Like an air filter, sheets of sensory tissue are folded to maximize surface area.
像一個空氣過濾器，它的感覺組織表面形成褶皺使表面積最大化。
This tissue contains millions of chemoreceptors, nerves that capture odor molecules.
這種組織包含了數百萬化學感受器，也就是能捕獲氣味分子的神經細胞。
So Deinonychus can sniff out prey from miles away.
所以恐爪龍能嗅到數英里外獵物的氣味。
The sense of smell in Deinonychus could alert it to a herd, a family group of plant eaters 10,15,20,30 miles away.
靈敏的嗅覺使恐爪龍能嗅到十到三十英里外的食草動物獸群。
And Sauroposeidon, like most plant eaters, are smelly.
而波塞冬龍與大多數食草動物一樣，氣味極大。
Unlike a meat eater, they produce huge amounts of waste,
與食肉動物不同，它們會排泄出大量廢物，
feces that form a trail marking everywhere they've been.
這些糞便成了它們行跡的標志。
For Deinonychus, that odor is a dead giveaway.
對波塞東龍來說，那種氣味是致命的叛徒。
And this carnivore's eyes can clearly see prey from a great distance.
而這種肉食動物能清楚地看到相隔很遠的獵物。
