He looks to be about three years old, and even as pups, they don't tame real easy.
他看来差不多有3岁了，即便是幼崽，他们也不太容易驯服。
Six of the pups passed, turning to look in the same direction only seconds after the person did.
6只狼崽通过了这项测试，测试中某人扭头望向远方，一秒钟后6只小狼崽也转头看向相同的方向。
And as the pups get older, the degu fathers begin actively playing with their toddler offspring.
随着幼鼠长大，八齿鼠父亲开始积极地与学步的子女玩耍。
When pups are six months old, they will start hunting larger animals with the rest of the pack.
幼狼六个月大时，就会开始和群体中的其他成员一起捕猎更大的动物。
Mongooses breed communally and individual pups form stable relationships with “escort” animals.
猫鼬在群居的环境中长大，它们的幼崽与“陪护”它们的猫鼬会形成一种稳定的关系。
Then, a few weeks ago, seal pups born elsewhere began floating in on small, shrinking pieces of ice.
几周前，在别处出生的小海豹便随着小冰块漂流而来，而这些冰块还在不断融化。
Although not parents, the pups receive nearly all their food from the escorts for up to three months.
尽管陪护猫鼬并不是幼仔的父母，但是幼仔们3个月大之前的食物几乎都是从陪护猫鼬那里获得的。
One new set of brain cells formed in the olfactory bulb, and were specifically tuned to the smells of his pups.
在嗅球中形成了一套新的脑细胞，特别适应于幼鼠的气味。
When the pups are very small, other pack members bring food to the mother so she does not have to leave the den.
如果狼宝宝太小，狼群的其他成员会给狼妈妈带来食物，这样她就不用离开巢穴。
Male red foxes are attentive dads, playing excitedly with their pups and bringing food home for the whole family.
雄性红狐狸也是细心的父亲，它会兴冲冲地和小狐狸玩耍，也会为全家带回食物。
A recent study has shown that neurogenesis took place in male mice in the days following the birth of their pups.
最近的一项研究表明神经形成在老鼠幼崽出生后的几天中在雄性老鼠的大脑中发生。
By two weeks of age, the pups can waddle, and about a week after that, they may come out of the den for the first time.
两周大时，就可以摇摇晃晃地走路；再过一周，就可以第一次走出兽穴。
The physical contact he had with his pups in the nest coupled with the smells of his young are what made the neurons grow.
在鼠窝中与幼鼠的身体接触加上幼子的气味是造成神经细胞生长的原因。
Mothers teach their pups crucial skills, such as how to spot polar bears and how to haul out onto the ice using their tusks.
妈妈教会小海象重要的技能，比如，如何认出北极熊，如何用獠牙把自己拖上冰块。
The whimpering pedigree pups, eight male and nine female, were born by Cesarean section at a veterinary clinic near their home。
这窝嗷嗷待哺的小家伙八男九女，以剖腹产的方式出生于离家不远的宠物医院中。
Specifically, the degu pups raised without fathers had fewer synapses in both the orbitofrontal cortex and the somatosensory cortex.
具体而言，在没有父亲的陪伴下被抚养长大的八齿鼠幼崽在眼窝前额皮质和躯体感觉皮质上都具有较少的神经突触。
It must be big enough to shelter the mother and pups from weather and protect the pups from other animals that may want to hurt them.
兽穴必须足以容下狼妈妈和幼崽，供它们遮风挡雨，同时保护小崽们不受其他动物的伤害。
Back from a kill, Bell, the breeding female of her pack, is greeted by 11 pups, anxious to nurse and beg a meal of regurgitated meat.
雌性野犬贝尔(Bell)捕食回来，受到11只幼犬的欢迎。它们迫不及待地想从母亲那里得到一餐反刍的肉食。
The duo also used the Wolf pups' dog companions as demonstrators, giving the dogs verbal commands to focus on the other side of the wall.
两位研究者同时还用狼崽的狗伙伴作示范，命令这些狗注视着墙后面。
In order to produce red Merle pups both parents must be chocolate brown or they must carry the gene and one of the parents must be Merle.
为了生出红山鸟色的边牧幼犬，父母双方必须都是巧克力(褐)色，或者它们均携带该基因，且其中一方必须为山鸟色。
The tiny pups, pictured at only three-days old, have to scramble and fight one another off to make sure they get their fair share of milk.
照片里这窝小宝宝才刚有三天大，他们一个个你推我挤，争前恐后地抢奶喝。
Mixed with the penguin multitudes were many hundreds of Antarctic fur seals, mostly pups, sleeping or jousting or playing tag in small gangs.
混杂在企鹅群里的还有近千头南极软毛海豹，大多是幼崽，它们或者呼呼大睡、或者拧在一起嬉戏、或者在小圈子里相互追逐。
When the researchers separated the father from his pups by placing a mesh screen between them in the cage, no additional brain cells appeared.
当研究者在笼中放置网状屏障将老鼠爸爸和幼鼠分隔开时，脑细胞也没有增加。
Rat pups whose mothers binged on fatty and sugary foods were more likely to prefer similar foods when compared to rats born from mothers with regular diets.
与吃常规食物的母鼠产下的幼鼠相比，那些母亲曾钟爱多脂肪，含糖食物的幼鼠更有可能选择类似的食物 。
Another set of neurons grew in the hippocampus, a crucial memory center in the brain, which helped to consolidate the smell of his pups into a long-term memory.
大脑中一个至关重要的记忆中心海马部位也生成了另一套神经细胞，这有助于将幼鼠的气味固化在老鼠爸爸的长期记忆中。
Only four of the nine pups passed the test at 4 months old. But when they were 6 months old, all of the wolves reliably followed the person's and the dogs' gazing cues.
4个月大时，9只狼崽中仅有4只通过了测试，但是长到6个月大时，所有的狼崽都能够明确地追随人和狗的视线。
They found that young mice raised in an enriched environment -- with toys and other stimulation -- passed along the learning benefits to pups they had after they grew up.
研究人员发现，在放有玩具和其它刺激物的“高级”环境中成长的幼鼠会将它们的认知经验传给下一代。
Like trainers raising dog puppies, the scientists gave the Wolf pups intensive obedience training, teaching them to sit, lie down, roll over, and look into a person's eyes.
就像训犬师训练小狗崽一样，科学家对小狼崽进行了强化口令训练，教它们坐下、躺下、打滚以及注视人类的眼睛。
Bad Health: Because so many pet store pups come from puppy mills, they are not the result of careful breeding and they are usually not well cared for before coming to the store.
不健康：由于太多的宠物店小狗来自宠物滥育厂，他们不是被精心繁育的而且通常在来到宠物店之前也没有被精心照料过。
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