有时候，色彩的快速变换可以用来惊吓掠食者或威胁入侵者。
Sometimes a sudden shift in color can be used to startle potential predators or threaten intruders.
作为最残忍的掠食者之一，虎鲸可能不符合文明动物的形象。
As one of the most brutal predators, killer whales may not fit the image of a cultured creature.
一种掠食动物经常大量捕食单单一种猎物时，这两个物种是紧密联系的。
When a predator always eats huge numbers of a single prey, the two species are strongly linked.
他发现，当掠食者的威胁逼近时，强侧化个体的进食速度是弱侧化个体的两倍。
He found that strongty-lateralised individuals were able to feed twice as fast as wealdy-lateralised ones when there was a threat of a predator looming above them.
外来掠食者最初不受自身掠食者的限制，它们可能会迅速繁殖并击溃预定目标。
Initially unrestrained by predators of their own, foreign predators are likely to be able to multiply rapidly and overwhelm intended targets.
上龙用四根桨状的四肢推动它庞大的身体在水里游来游去，轻而易举地就能掠食形似海豚的鱼龙。
Using four paddle-like limbs to propel its bulky body through the water, the pliosaur made easy work of passing prey such as dolphin-like ichthyosaurs.
为了应对兔子的问题，定居者们引进了白鼬。 白鼬是黄鼠狼家族的一员——也是一个恐怖的掠食者。
To deal with the rabbit problem, settlers introduced stoats — a member of the weasel clan and a terrific predator.
她孵化出了具有强侧向或弱侧向的雏鸡，然后为这两组小鸡准备了隐藏在小鹅卵石中的食物，还制造出假的掠食者飞过头顶的威胁形状。
She hatched chicks with either strong or weak lateralisation, then presented the two groups with food hidden among small pebbles and the threatening shape of a fake predator flying overhead.
野猪经常被发现在沼泽边掠食。
The Sus scrofa is often found marauding in the swamp margin.
城市是一个掠食资源的老饕。
机车是为了让驯鹿免受掠食者的攻击。
这种鸟可能能够打败蛇、猴等掠食者。
The bird may have been able to beat off predators such as snakes and monkeys
提醒：掠食者包括棕熊、狼、猞猁和鼬。
Cons: Predators include brown bears, wolves, lynx and weasels.
他们的真正目的其实是相互帮助觅食和躲避掠食者。
Their purpose is to help their members eat and avoid being eaten.
周四，美国在利比亚上空部署了两架掠食者无人驾驶机。
The US began deploying two Predator attack drones over the skies in Libya on Thursday.
这种蜥蜴面对掠食者的独特逃生措施包括自由行走在水面上！
This lizard's unique means of escaping predators involves literally walking on water.
如果不是科学家而是掠食者等在那儿的话，它们就被吃掉了。
Had predators rather than scientists been waiting, they would have been eaten.
温暖的环境给了克洛维斯人和他们的掠食对象种群繁荣的机会。
It was this warming that gave the Clovis people and their prey a chance to thrive.
当像鲨鱼这样的顶级掠食者从环境中消失时，生态系统就会陷入混乱。
When top predators like sharks disappear from their environments, ecosystems fall out of whack.
狼是农场主必须面对的众多掠食者之一，他们还有对付山狗、山狮和家狗。
Wolves are one of many predators ranchers face, including coyotes, mountain lions, and domestic dogs.
设想一只动物，它必须去觅食，但同时也不得不保护自己免受掠食者的攻击。
Think about an animal. It has to get food, but at the same time it has to protect itself from predators.
然而如今的掠食者实际上要比过去要小一些，其原因似乎与猎物的速度有关。
Yet today's predators are smaller than those of the past, and the reason seems to have something to do with the speed of their prey.
与龙争夺食物的是，德拉肯斯堡的主要掠食者，像猎豹，黑背豺，野猫和山猫。
Competing with dragons for food are Drakensberg's main predators, including leopards, black-backed jackals, caracals and servals.
不久之后，美国的“掠食者”侦察机和地面搜查人员又被调往伊拉克执行任务。
Soon afterwards, America's robot Predators and human manhunters were dispatched on another assignment, to Iraq.
这只巨塔般的掠食者，以及象目的恐象，是地球上曾经存在的最大的哺乳动物。
This towering plant eater, along with Deinotherium — a member of the order elephants belong to — were the largest mammals to ever walk the earth.
通过数字升级，“掠食者”无人机将通过联网设备与其它机器人及系统进行通讯。
This digital upgrade also turns the drones into networked devices that can communicate with other robots and systems.
他们开始繁殖卡克布、保护它们的蛋，并且设置陷阱以确保不会有掠食者碰到鸟。
They began incubating the kakapos, protecting and guarding their eggs, and setting traps to ensure that no predators could get to the birds.
这些老鼠的掠食对象当中还有信天翁的幼鸟，这种幼鸟的体重约是老鼠的300倍。
Among their prey are albatross fledglings, which weigh some 300 times as much as the mice.
这些老鼠的掠食对象当中还有信天翁的幼鸟，这种幼鸟的体重约是老鼠的300倍。
Among their prey are albatross fledglings, which weigh some 300 times as much as the mice.
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