弯曲杆菌感染通常较为温和，但对十分年幼的儿童、老年人以及免疫抑制人群可能具有致命性。
Campylobacter infections are generally mild, but can be fatal among very young children, elderly and immunosuppressed individuals.
相比之下，当幼龙虾在没有牡蛎片的光滑鱼缸中饲养时，大多数都发育出了两个刀爪。
In contrast, when juvenile lobsters were reared in a smooth tank without the oyster chips, the majority developed two cutter claws.
幼鲸长出一层厚脂肪以抵御冰冷的海水。
The baby whale develops a thick layer of blubber to protect it from the cold sea.
宰杀海豹幼仔的行为已引起了环保团体的强烈抗议。
The culling of seal cubs has led to an outcry from environmental groups.
这只母狮还在给它的幼崽喂奶。
动物们排斥一窝中最弱小的幼仔。
大象曼弗雷德伸出它的鼻子，轻轻地抱起了幼仔。
Manfred the elephant reached out with his trunk and gently scooped up the baby.
只有当母老虎在保护自己的幼崽时，或者当公虎在保护母老虎不受其他雄性动物的注意时，它们才会殊死搏斗。
Tigers fight to death only when a tigress is defending her young, or when a tiger is guarding a tigress from the attentions of other males.
EPIC 花费资金购买了价值250万美元的幼野牛，这些幼野牛将按照草饲协议饲养，购买价格有保障。
EPIC fronted the money for the purchase of $2.5 million worth of young bison that will be raised according to its grass-fed protocols, with a guaranteed purchase price.
我猜一旦幼崽们引起了其母亲的注意，它们就安全了。
I am guessing that once the babies have the mother's attention, they are safe.
蚜虫的运动也是如此，当吃完一株食用植物的幼叶，它们的后代会飞到另一株宿主植物上，没有蚜虫会再回到最初的地方。
So can the movement of aphids when, having depleted the young leaves on one food plant, their offspring then fly onward to a different host plant, with no one aphid ever returning to where it started.
这有力地表明，幼鸡的右脑在学习这些行为方面只有很小的作用，或几乎没有发挥作用。
That strongly suggested that the right side of the chick's brain played little or no role in the learning of such behaviours.
让不同的幼袋鼠处于不同的发展阶段，有利于母袋鼠同时照顾它们。
To put different young kangaroos at various stages of development is advantageous for the female kangaroo to handle them at the same time.
有东西正在触碰着它们的幼崽。
尽管蜥蜴可能对栖息地有要求，它对幼仔的健康却完全漠不关心。
Although the lizard may stake a claim to its habitat, it exerts total indifference toward the well-being of its young.
她载着其中一批幼崽，而其它的在等她回来。
While she is taking one load of hatchlings, the others wait for her to come back.
蛋大约在十天内孵化，不过，鸭嘴兽的幼仔只有青豆大小，完全无法自立。
The eggs hatch in about ten days, but platypus infants are the size of lima beans and totally helpless.
在佛罗里达海湾沿岸被工业污染的水域中，海豚幼崽异常高的死亡率可能是被它们母亲的乳汁毒害的结果。
The unusually high mortality rate among dolphin calves in the industrially contaminated waters along Florida's Gulf Coast is probably the result of their being poisoned by their mother's milk.
因为树懒的体型比棕熊和北极熊要小，而且面临着更大的来自危险动物的威胁，所以它们可能会带着幼仔采取额外的预防措施。
Because sloth bears are smaller than brown and polar bears and are under greater threat from dangerous animals, they may have adopted the extra precaution of carrying their cubs.
在出生6到8周后，幼崽们会离开它们的母亲。
Then about six to eight weeks after birth, the offspring leave their mothers.
我从来没有想过，幼崽会在地上游荡，在父母的保护下成长壮大。
I never thought that the young would be hanging out on the ground, growing and gaining strength as its parents guarded it from above.
尽管北极熊的运动能力同样低下，北极熊幼崽还是和妈妈一起前行。
Although polar bears' locomotion is similarly inefficient, polar bear cubs walk along with their mother.
总的来说，这些因素可能选择不爬树作为懒熊幼崽的防御策略。
Collectively these factors probably selected against tree-climbing as a defensive strategy for sloth bear cubs.
除去它们的藻类，斑点蝾螈的幼仔孵化得更小更不成熟。
Take away their algae, and spotted salamander babies hatch smaller and less mature.
它的母亲在附近被杀了，洞里浸满了水，其余的幼崽都死了。
Its mother had been killed nearby an' th' hole was swum out an' th' rest o' th' litter was dead.
另一件事是，如果幼崽和家族其他成员分开，一旦其他成员离得足够远，幼崽的生存本能就开始发挥作用。
Another thing would be, if a hatchling gets separated from the rest of its family, once the others get far enough away, its survival instinct kicks in.
这就意味着，以这片水域中的鱼类和磷虾为食的帝企鹅，必须去到更远的地方觅食，而饥饿的幼崽则需要等待更长的时间。
This means that king penguins, which feed on fish and krill in this body of water, have to travel further to their feeding grounds, leaving their hungry chicks for longer.
来自悉尼南部的这个幼袋鼠出生时只有一颗软芯糖豆儿那么大，在它丽丽妈妈的育儿袋里呆六个月。
The joey, from just south of Sydney, was born the size of a jellybean and spent six months inside his mother, Lily's pouch.
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.
黑熊幼崽用树来防御，而经常生活在没有树的环境中的棕熊和北极熊则依靠攻击性来保护它们的幼崽。
Black bear cubs use trees for defense, whereas brown bears and polar bears, which regularly inhabit treeless environments, rely on aggression to protect their cubs.
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