Because if the predator doesn't know you are there, it is not going to try to eat you.
因为如果捕食者不知道你在那里，它就不会试图吃掉你。
In this situation, the predator and prey population may continue in this cyclical pattern for some time.
在这种情况下，捕食者和被捕食者可能会在一段时间内继续这种循环模式。
Low prey population levels then provide inadequate food for the predators, causing the predator population to decrease.
较少的猎物数量为捕食者提供了不足的食物，导致捕食者数量减少。
This unexpected display of color startles or confuses the predator and provides the would-be prey with an opportunity to escape.
这种意想不到的颜色表现会吓到捕食者或使其迷惑，并为潜在的猎物提供逃跑的机会。
When experimental populations are set up under simple laboratory conditions, the predator often exterminates its prey and then becomes extinct itself, having nothing left to eat.
当实验种群在简单的实验室条件下建立起来时，捕食者往往会消灭它的猎物，然后自己也走向灭绝，因为没有东西可以吃。
The foam tastes so bad that the predator won't do it again.
泡沫尝起来很糟糕，以至于捕食者再也不会这样做了。
They do that to draw the predator away from their nest, away from their eggs or their young birds.
它们通过这样做来把捕食者引离它们的巢，离开它们的鸟蛋或幼鸟。
As predicted, the birds incubated in the light looked for food mainly with their right eye, while using the other to check out the predator.
正如预测的那样，在光线下孵化的小鸟主要用右眼寻找食物，而用另一只眼睛观察是否有捕食者。
Insane pumpkin carving of the Predator.
疯狂的南瓜雕刻——食肉动物。
If the predator is a mammal (which can hear), they utter alarm calls.
假如捕食者是个哺乳动物(具备听力)，它们就发出呼叫。
The technology of UAVs has already moved beyond the Predator, however.
然而，无人机的科技已经超越了“掠夺者”。
The role of the Predator drone has changed dramatically over time.
捕食者无人机的作用随着时间的推移发生了巨大变化。
Inventors have given us the antibiotic and the air bag, the plow and the Predator drone.
发明家创造出抗生素和安全气囊，扫雪机还有掠夺者无人机。
THE Predator is an unmanned aerial vehicle, 36 feet (11 metres) long with a 66-foot wingspan.
“食肉动物”无人驾驶，身长36英尺(11米)，翼展66英尺。
Moments later, the predator struck again, maiming another Russian man who had to be rescued by divers.
片刻之后，捕食者再次发动攻击，重伤了另一位无疑是在潜水员的营救下才得以幸存的俄罗斯人。
When I first saw a briefing on the Predator three years ago, I saw one of my mission sets disappear.
他接着说，“当我三年前初次读到关于‘掠夺者’的一份简报时，我注意到我的一项军事任务也没了。
The predator looks for kids already vulnerable and then entices them by offering a romantic relationship.
捕猎者寻找那些本身就很脆弱的孩子，然后给他们提供一段很浪漫的关系。
When the echo returns to the hunting bat, the predator can glean information about the size, location and more of prey.
这些声调组成一个回声定位声波，蝙蝠接收到返回声波的时候，这个捕食者就会获得猎物的大小、位置和多少等信息。
James K. Galbraith is author of the Predator State: How Conservatives Abandoned the Free Market and Why Liberals Should Too.
吉姆斯·k·加尔布·雷斯是《肉食国家：保守派怎样抛弃自由市场以及为什么自由派也应该如此》一书的作者。
Better known for its work in nuclear physics, General Atomics stole a march on the big firms by producing the Predator drone.
虽然通用原子能公司在核物理方面名气更响一些，但该公司已经比那些宇航巨头抢先一步生产出了“捕食者”无人机。
Since the prey is so much larger than the predator, it sometimes takes the shrimp two weeks to finish off a single (living) starfish.
由于被捕食的动物要比捕食它们的掠夺者大得多，有时需要两个星期才能让小丑虾去吃完一个活海星。
That advice may seem perfectly sensible to parents bombarded by heartbreaking news stories about missing little girls and the predator next door.
对于那些耳濡目染太多悲惨新闻——比如女孩失踪，凶手就在隔壁之类——的家长而言，这种建议似乎是合情合理的。
But when the predator was closing in, those brain regions shut down and a network of previously quiet regions farther back in the midbrain became active.
但是，当捕食者接近时，这些部位会被先前中脑部静止的区域替代。
Some residents and experts said the predator may be a bear, a wayward panther or cougar, or even a Wolf because 3-inch paw tracks were found at the scene.
一些居民和专家认为这种食肉动物可能是一只熊，一头任性的豹子或狮子，抑或是一头狼，因为在现场发现了3英寸长的爪迹。
To test these possibilities, Mobbs and his colleagues are beginning to study people who suffer from fear-related disorders as they play the predator game.
为了检定这些可能的症状，莫伯斯和同事们正在对那些在游戏中忍受与恐惧相关病症的人展开研究。
The animal that goes to a favorite food-foraging location and sees signs that a predator was there - but not the predator itself - may be on guard the next time.
在某些情况下，我们会幻想自己的先人又复活了。 “一个动物到它最喜欢觅食地点，看到有个食肉动物一在那里的迹象，但不是食肉动物本身，可能是上次（下次）在那里站岗。
He found that when the predator was bearing down on players, they often experienced the same changes to their skin as those seen in people having panic attacks.
他发现当捕食者冲向玩家时，他们的皮肤都会出现类似人们感到恐慌时会发生的那种变化。
Many birds have an instinct to protect their young when approached by a predator, but they will eventually give up if the predator is too strong or dangerous to deter.
大多数鸟类都有保护他们幼仔接近食肉动物的天性，但是他们最终会因为来袭者的强大或者危险去阻止而放弃。
This "burglar alarm," scientists speculate, is meant to attract the attention of an even bigger creature that might be able to eat the predator and free the jellyfish.
科学家推断，这种“防盗报警器”是为了引起更大生物的注意，有可能能够吃掉它的敌人，从而将它解救出来。
This "burglar alarm," scientists speculate, is meant to attract the attention of an even bigger creature that might be able to eat the predator and free the jellyfish.
科学家推断，这种“防盗报警器”是为了引起更大生物的注意，有可能能够吃掉它的敌人，从而将它解救出来。
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