英语听力：《恐龙的战争》3 顽强防御—11

The number-one concern in life would be feeding the beast.

The land is covered in vast forests offerns, pines, and monkey puzzle trees. Many of these plants have almost nonutritional valuel.

The hardest job in the animal world, the dinosaur world, was not T-Rex’s job. Digesting meat is a piece of cake. It’svery, very simple. Digesting plant fiber is the hardest job in the world.

To gain enough nutrients to grow indestructibly large, Sauroposeidon has to consume huge amounts of vegetation.

They were like walking vacuum cleaners.

If you’ve got 40 or 50 tons of flesh to feed and you eat low-quality food, you have to put away hundreds of pounds,maybe a ton of this stuff, every day.

When growing is your best defese, gaining weight is serious business. So Sauroposeidon does away with time-consuming tasks like chewing.

If you could just swallow that stuff and let your giant stomach mash it up for you, you could move in a lot more food per unit time and you could get a lot bigger.

Sauroposeidon’s 52 chisel-like teeth are perfectly designed for the job. They can rake leaves and twigs straight off a tree.

They’ve got these big teeth that are just cropping devices. They just bite down on a branch and either take the whole branch or strip the leaves and needles off and then swallow it down.

To be able to digest this huge volume of food and grow big enough to avoid attack requires a stomach as large as a ton. That’sas big as a swimming pool, and it’s filled with acid so concentrated it can dissolve iron.

It had to be able to hold maybe a ton or more of plant material at a time, and we’re talking about something …