动物们排斥一窝中最弱小的幼仔。
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.
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.
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.
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.
图片：1一只黑白相间的白颈狐猴幼仔。
雌性要抚育它们的幼仔三至四个月，直到小宝宝能够自己游泳。
Females nurse their young for three to four months until the babies can swim on their own.
一位饲养员告诉我必须尽快赶到动物园，因为我们有了一个熊猫幼仔。
A keeper here called and said that I needed to get to the zoo as soon as possible, that we had a panda cub.
不过直到现在，研究者才认识到两栖动物的幼仔可能也会在水下发出声音。
Until now though, researchers did not realise that amphibian larva might also produce sounds underwater.
那些巢穴在墨西哥湾海岸周围的鸟类现在正在无油的海滩上养育它们的幼仔。
Those that nest around the Gulf’s shores are right now raising their chicks on oil-free beaches.
据当地媒体报道，科研人员穿着熊猫服是为确保避免对幼仔环境的人为干扰。
Researchers wear panda costumes to ensure that the cub's environment is devoid of human influence, according to local media.
医院目前共看护着23只红毛猩猩幼仔，它们之前均被母亲遗弃或虐待。
All 23 baby orangutans treated there were rejected or abused by their mothers.
科学家在一块6700万年的化石中发现了一条蛇盘绕在恐龙蛋和一只幼仔周围。
Scientists have found a 67 million-year-old fossil of a snake coiled around dinosaur eggs and a hatchling.
它们懒的出了名，总是躺在阴凉处，常常忽视幼仔，而雌性却会冒着生命危险去猎食。
Notorious loungers, they'll lie in the shade, often ignoring their cubs, while the females risk life and limb on the hunt.
两只熊猫都租借到英国，租期为10年。据悉，它们在此期间产下的幼仔将在出生后不久送回中国。
Both pandas are being lent to Britain for 10 years, although it is expected that any offspring they produce during that period will be returned to China shortly after birth.
然后研究小组确认他们发现了一条蛇盘绕着一颗破碎的恐龙蛋，周围还有一只幼仔和另外两枚蛋。
The team then recognized they had actually found a snake coiled around a broken egg, with a hatchling and two other eggs nearby.
青蛙的蝌蚪能够发出声音这一发现，也提高了许多其他水生动物幼仔以同样方式沟通的可能性。
The discovery that frog tadpoles can make sounds also raises the possibility that a host of aquatic larvae communicate in a similar way.
在一项新研究中，研究者用健康的母鼠抚育压力大的母鼠产下的幼仔，发现表观遗传变化只能部分修复。
In the new study, researchers also had healthy mothers raise the offspring of stressed mothers, and found that the problems were only partially fixed.
大熊猫寻找伴侣时非常挑剔，野生雌性大熊猫每隔两三年生一只幼仔，圈养大熊猫的繁殖率就更低了。
Pandas are notoriously fussy when it comes to finding mates. Females in the wild normally have a cub once every two to three years, and the fertility of captive giant pandas is even lower.
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。
Although not parents, the pups receive nearly all their food from the escorts for up to three months.
当幼仔饥饿时，它们会将嘴唇向牙齿后拉，发出指甲挠抓黑板般的尖锐叫声，以促使它们的母亲躺下来喂奶。
When cubs are hungry, they produce a grating fingernails-on-blackboard sound, with their lips pulledback from their teeth, to encourage their mother to lie down so they can nurse.
因为乞食需要消耗一定的精力，贝尔博士推断幼仔吵闹的程度取决于它们估计自己的吵闹能得到的回报的多少。
Because begging has a cost in terms of energy, Dr Bell speculated that the amount of noise pups make should depend on the degree to which they think they will get a return on their work.
大象也会用它们的鼻子举起或是轻推大象幼仔跨过障碍物，用鼻子解救在泥泞中困住的同伴，或者举起脚边新生的小象。
Elephants also use their trunks to help lift or nudge an elephant calf over an obstacle, to rescue a fellow elephant stuck in mud, or to gently raise a newborn elephant to its feet.
没有海冰，北极熊就无法生存。它们需要利用海冰来抚养幼仔，四处漫游，并以此为平台捕猎它们的主要食物，海豹。
Polar bears cannot survive without sea ice, using it to raise their young, to travel and as a platform for hunting seals - their primary food source.
海马栖息在世界各地的热带和温带沿海水域，这些鱼类有个独特的功能，是地球上唯一由雄性孕育未出生幼仔的动物。
Seahorses are among the only animal species on Earth in which the male bears the unborn young, a unique trait in these fish that inhabit tropical and temperate coastal waters worldwide.
“白云”在1999年接受人工受精后生下了一只幼仔，它就是“华美”，是第一只出生在美国并成长到青春期的大熊猫。
Bai Yun gave birth to a cub in 1999 after she was artificially inseminated. Her offspring, Hua Mei, is the first U.S.-born panda to survive into adolescence.
“白云”在1999年接受人工受精后生下了一只幼仔，它就是“华美”，是第一只出生在美国并成长到青春期的大熊猫。
Bai Yun gave birth to a cub in 1999 after she was artificially inseminated.Her offspring, Hua Mei, is the first U.S.-born panda to survive into adolescence.
“白云”在1999年接受人工受精后生下了一只幼仔，它就是“华美”，是第一只出生在美国并成长到青春期的大熊猫。
Bai Yun gave birth to a cub in 1999 after she was artificially inseminated.Her offspring, Hua Mei, is the first U.S.-born panda to survive into adolescence.
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