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.
但是在研究者能够说出的范围内，角蛙蝌蚪是第一种能够发出声音的水下幼仔，同时也是第一种能够这样做的脊椎动物幼仔。
But as far as the researchers can tell, horned frog tadpoles are the first underwater larvae, and first larvae of any vertebrate, to make sounds.
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.
动物们排斥一窝中最弱小的幼仔。
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.
1861年，阿拉伯贩子从阿比西尼亚平原(现今的埃塞俄比亚)捕获了一头两岁大的非洲象幼仔，将其倒手卖给了欧洲的动物收购者。
In 1861, Arab traders captured a 2-year-old African elephant calf on the plains of Abyssinia, now Ethiopia, and sold him to a European animal collector.
大多数鸟类都有保护他们幼仔接近食肉动物的天性，但是他们最终会因为来袭者的强大或者危险去阻止而放弃。
Many birds have an instinct to protect their young when approached by a predator, but they will eventually give up if the predator is too strong or dangerous to deter.
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.
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.
比林斯说，动物克隆实验已表明克隆是“不安全的，也是危险的”，因为许多克隆幼仔有先天性畸形，或者出生前或出生后不久就死去。
Billings said that experience with cloning of animals shows that cloning is "unsafe and risky" because many of the young are born with deformities or die shortly before or after birth.
有蹄目动物的幼仔出生时处于发育的高级阶段，能够在几天内照料自己。
In ungulates, the young are born in an advanced stage of development and can fend for themselves in a few days.
密尔沃基的国家动物园自1975年以来第一次迎来美洲豹幼仔。
The Milwaukee Country Zoo has its first jaguar cubes since 1975.
这周我们学习了动物的幼仔：小牛，小鸡，小鸭，小猫，小羊，小猪，小狗。
This week we have been working on baby animals: calf, chick, duckling, kitten, lamb, piglet, and puppy.
对于幼仔发声的更多研究可能揭示出哺乳动物牙牙学语要比以往我们所认为的广泛很多。
Further research about infant vocalizations could reveal that babbling is a much more widespread phenomenon in mammals than was previously thought.
动物爱护幼仔，关心幼仔。
考拉熊是一种袋类动物，它们的袋子朝向后退，这样它们就可以把它们的小幼仔放在袋子里了。
Koala bears are marsupials meaning that they carry their young in a pouch. Koala bears have pouches that open toward the hind legs.
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, researches did not realise that amphibian larva might also produce sounds underwater.
美国南卡罗莱纳州濒危动物园的一头两岁猩猩为两只23天大的白虎幼仔充当养母。
A 2-year-old chimpanzee at a rare species zoo in South Carolina, US, took on a surrogate role after two 23-day-old white tiger cubs were separated from their mother.
美国南卡罗莱纳州濒危动物园的一头两岁猩猩为两只23天大的白虎幼仔充当养母。
A 2-year-old chimpanzee at a rare species zoo in South Carolina, US, took on a surrogate role after two 23-day-old white tiger cubs were separated from their mother.
应用推荐