英語聽力：完美捕食—19

--The irony for many predators is they are very concerned about injuring themselves.

Even the toughest most well-armed man-eaters regularly come face to face with prey that can kill them. Whether you had the jaws of a Tyrannosaurus Rex, or are armed to the teeth like a raptor, every hunt just might be your last.

--To think about predation, it is very dangerous both for the prey and for the predator.

--There are many specimens that have puncture wounds and open sores when they died.

An injury, even a minor one, can stop a predator from hunting -- a virtual guarantee of death by starvation.

--The life of a carnivore was so hard. They were beat up. They were all beat to hell before they became a fossil.

--It's not like Africa-Asia today where you have lots of small animals and just one or two big things like elephants and rhinos. We are talking about an entire landscape that’s filled with herds of multi-ton herbivores.

For carnivores toddy, just as during the Cretaceous, staying alive is no mean feat.

--If we look at lives of living predators today, they're pretty short lives. Each individual life does not span its potential. Whenever they become older and weaker, they're most susceptible to injury. And every time you hunt, you’re putting your life on a line.

In the world of dinosaurs, predators stop at nothing to survive. They used every tool in their arsenal, brains, eagle eyes, stealth flight, super hearing and an advanced sense of smell. But in the end, those who live by the claw sometimes died.