一旦摆脱了捕食的压力，巨大的体型对食草动物没有什么好处。
Once free from predation pressure, large body size is of little advantage to herbivores.
显然，它们所捕食的夜间飞行的昆虫必须找到某种识路的方法。
Obviously the night-flying insects that they prey on must find their way about somehow.
比如说，像小鹿或者山羊这种被捕食的种群，它们的代表动作就是突然快速逃跑的动作和突然转弯；相反的，猫科动物之类的捕食种群会练习潜行追踪、猛扑和撕咬等动作。
Prey species, like young deer or goats, for example, typically play by performing sudden flight movements and turns, whereas predator species, such as cats, practice stalking, pouncing, and biting.
然而，如果能给被捕食的动物提供一些它们在野外时那样的安全区域，它们的数量会降到很低但不灭绝。
However, if safe areas like those prey animals have in the wild are provided, the prey population drops to low level but not extinction.
特别是，龙虾幼虫需要更短的时间才能长到不再容易受到幼鳕鱼捕食的大小，幼鳕鱼是它们生存的主要威胁。
In particular, lobster larvae take less time to reach the size at which they are no longer vulnerable to predation by young cod, the chief threat to their survival.
它们用锋利的牙齿将毒液注入被捕食的昆虫体内。
They use their sharp teeth to force poison into the insects they catch for food.
然而，大自然是非常聪明的，捕食者也会用颜色来吸引它们捕食的动物。
Nature, however, is very clever, and predators also use colors to attract the animals they feed on.
生物学家认为这种植物进化出捕食的能力是适应潮湿、贫瘠土壤的一种途径。
Biologists suggest that the plants evolved the ability to capture prey as a way to adapt to living in moist, nutrient-poor soils.
这个至今未得到确诊的疾病看起来会影响东北虎在野外捕食的能力。
The as-yet-unidentified disease seems to affect tigers' ability to hunt wild game.
好消息是，如果对老虎加以保护，保证有可捕食的猎物，老虎数量是可以恢复的。
The good news is that tigers can recover if they are protected and have prey to eat.
他们沿途遭遇了厚重的冰块、风大浪急的海面，以及许多正在捕食的鲸鱼。
Along the way, they encountered thick packs of ice, rough seas and lots of feeding whales.
Hammerschlag说，如果这些鲨鱼是随机捕食的动物，它们直接在海豹的聚居地徘徊就可以了。
The sharks feeding at seal Island could have just hovered right where the seals congregated if they were random killers-of-opportunity, Hammerschlag said.
虽然贪玩的小猎豹偶尔忘了捕食的职责，混战一团，但是这只猎豹和她不寻常的大家族似乎在自给自足方面取得了很好的成绩。
This cheetah and her unusually large family seem to be making good progress on the self-catering front, even if the playful cubs sometimes forget hunting duty for a spot of rough and tumble instead.
当鸟类迁移，它们所捕食的昆虫，或是作为食物的各类植物却仍留在原处，这就有可能会扰乱当地数千年未曾改变的生态系统。
When birds move, the insects or plants they eat often do not, possibly upsetting ecosystems unchanged for thousands of years.
令霍德着迷的是，哥贝克力山顶遗迹的石柱上的雕像不是以鹿和牛等可捕食的动物为主，而是以像狮子、蜘蛛、蛇和蝎子等对人类有威胁的动物。
Hodder is fascinated that Gobekli Tepe's pillar carvings are dominated not by edible prey like deer and cattle but by menacing creatures such as lions, spiders, snakes and scorpions.
弗里克指出，蝙蝠在平衡两种需求，一种是等待夜幕的降临，为了躲避那些白天捕食的鹰；另一种是捕捉昆虫的需求，它们往往在傍晚很丰富。
The bats are balancing the need to wait until dark, when day-flying hawks stop hunting, and the need to catch the insects when they are most plentiful, right at dusk.
他们的重要发现包括一种深海鲨鱼和一种海星，前者可以把胃部充满水来使身体胀大，从而吓跑捕食者，后者则只以浮木为食。
Their notable finds included a deep-sea shark that swells its size by filling its stomach with water to scare off other predators, and a starfish that eats only driftwood.
捕食者是维持群落物种丰富多样的一个重要因素。
Predators are an essential factor in maintaining communities that are rich and diverse in species.
蝙蝠能避开其他捕食者，找到猎物——通常是夜间飞行的昆虫。
The bats are able to avoid other predators, and locate prey—typically insects that fly around at night.
既然捕食者可以让雏鸟为食物付出巨大代价，那么乞食的雏鸟们到底可以从这种交流方式中得到什么益处呢？
Given that predators can make it costly to beg for food, what benefit do begging nestlings derive from their communications?
鲨鱼是位于海洋食物链最顶端的捕食者。
许多策略都是通过“捕食”其他策略来取胜的，因而，只有当猎物能存活时，这些策略才能兴旺发达。
Because many strategies could succeed only by "preying" on other strategies, they would thrive only as long as their prey survived.
非但没有违反惯性定律，动物们在行走、奔跑、躲闪、跳跃、飞行、捕食或逃生中，将惯性定律的优势充分发挥。
Far from violating the laws of motion, animals exploit them to their advantage as they walk, run, dodge and jink, leap and fly, pounce on prey or spring to safety.
很多物种可以感知和利用人类察觉不到的电磁场导航和捕食。
Many species perceive and use electromagnetic fields that are imperceptible to humans to navigate or find prey.
黑曼巴用它们闪电般的速度逃离威胁，而不是用来捕食猎物。
Black mambas use their incredible speed to escape threats, not to hunt prey.
玩耍可以让一只小动物探索环境并在相对安全的环境中练习技能，因为周围的成年动物通常不期望幼崽应对威胁或捕食者。
Play allows a young animal to explore its environment and practice skill in comparative safety since the surrounding adults generally do not expect the young to deal with threats or predators.
当小鱼面临极其困难的问题时，比如说，突然遭到几个捕食者的袭击，他们会立刻形成鱼群。
When small fish face an extremely difficult problem-an attack, say, from several predators at once-they deal with it by forming a school.
它的作用是在章鱼逃跑时分散捕食者的注意力。
It serves to distract a predator while the octopus makes its escape.
随着海星捕食者的减少，海星的数量会增加。
With a decline in starfish predators, the starfish population can increase.
随着海星捕食者的减少，海星的数量会增加。
With a decline in starfish predators, the starfish population can increase.
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