Dugongs are the largest herbivores in the sea.

儒艮是海洋里最大的食草动物。

Where plants abound, herbivores will not be far behind.

植物比比皆是的地方食草动物的出现也不会落后。

But in modern times, numbers of grazing animals have declined sharply because of extinction, when a species of animal – the dinosaurs for example – no longer exist, and domestication, when wild animals are controlled by humans to work or for food.

但在现代，由于灭绝（例如恐龙等物种已不复存在）和驯化（野生动物被人类控制以用于劳作或食用），食草动物的量急剧减少。

However, the process by which grass and fiber is broken up in the stomachs of cows and other grazing ruminants has a byproduct, methane, a potent greenhouse gas.

然而，草和纤维在牛和其他食草反刍动物的胃里的分解过程会生产出种副产品——，种强力的温室气体。

Thorns help protect the plant from plant-eating animals.

刺有助于保护植物免受食草动物的伤害。

It also suggests that herbivory evolved in the crocodile clan on several occasions.

该研究还表明鳄鱼家族的食草性进化了好几次。

So back the time, there were millions of big herbivores roaming the landscape.

回到过去，有万的大型食草动物在这片土地上漫游。

Herbivores, for example, leave a third of food nutrients in their poop.

例如，食草动物的大便中含有三分之的食物营养。

Yet its stature that clearly outclassed by plant eaters.

而身材更庞大的是食草动物。

Many species within these genera grow on dung from large herbivores.

这些类属中的许多物种都是靠大型食草动物的粪便生长的。

At first, the group thought the bone belonged to a smaller plant-eating dinosaur.

起初，研究小组认为这块骨头属于种较小的食草恐龙。

The East African savannahs support millions of grazers.

东非大草原养育着成千上万的食草动物。

Experts say they are the first dinosaur tracks ever found there and were likely made by long-necked, bipedal, or two-legged, herbivores that were up to 33 feet long, weighing up to four tons.

专家表示，这是当地首次发现恐龙足迹，可能是由长颈，双足行走的食草动物留下的，这些动物体长可达 33 英尺，重达 4 吨。

" Underestimated. Underappreciated, " she went on. " Aren't you sick of it? Predators—they may be strong and loud, but prey outnumber predators ten to one. Think about it: ninety percent of the population, united against a common enemy. We'll be unstoppable."

“不被重视，没人欣赏。” 她接着说：“难道你不厌倦吗？食肉动物虽然身强力壮，但是食草动物的量是他们的10倍。你想想吧，90% 的人团结起来对付共同的敌人，我们坚不可摧！”

But it's a key role really that they play in controlling herbivore numbers and enabling the filth itself and the red grass go palatable and grasses to actually regenerate themselves as well.

但它们在控制食草动物的量方面发挥了关键作用，使脏东西和红草变得美味，草也能自我再生。

Grass-eating animals like the cow can move their jaws sideways as well as up and down, in order to grind their food well; but flesh-eating animals like the dog can only move their jaws up and down.

牛类的食草动物, 上下腭除了上下活动, 还可以横向活动, 这样可以把食物磨得很碎；但是, 食肉动物的上下腭, 只能上下活动。

While there's evidence that some insects are sensitive to high levels of nickel in plants, larger plant-eaters don't seem to be put off by it at all.

虽然有证据表明某些昆虫对植物中高浓度的镍很敏感，但体型较大的食草动物却似乎完全不受影响。

And without the herbivore effect in the model-so in the control run-we found that only 50 percent of the permafrost area would remain by the year 2100.

如果模拟中没有食草动物的影响，即在对照实验组中，我们发现到2100年，只有50%的永久冻土区能保留下来。

In the Sundarbans, the tigers keep large numbers of people out of the forest, and they also keep all the herbivores on the move, so they don't damage the trees.

在松达班，老虎的出没使得许多人离开森林，也使得所有的食草动物四处奔波，所以它们不会过多地损坏树木。

Some protect against plant-eating animals by secreting itchy toxins from the leaf or stem epidermis, which, if you've ever run into a stinging nettle, you are already painfully familiar with.

有些植物通过从叶子或茎表皮分泌令人发痒的毒素来保护自己免受食草动物的侵害，如果你曾遇到过荨麻，那么你就已对这种毒素很熟悉了。