四足动物的脖子通常很长，这样它们就可以毫不费力地够到食物，但是大象的脖子很短，这样它就可以更容易地支撑它巨大的头和沉重的牙齿的重量。
The neck of four footed animals is usually long, to have them reach their food without difficulty, but the elephant has a short neck, to make him more easily support the weight of his huge head and heavy teeth.
我们读了一封关于一些四足动物的髓质脊髓的信。
We read a letter about the medulla spinalis of some quadrupeds.
由塔丰·奥兹利克带领的土耳其科学家提出，一个基因的突变可能会导致四足动物的出现。
Turkish scientists led by Tayfun Ozcelik suggested that a mutation in a single gene might result in quadrupedalism.
腹鳍对应着四足动物的后肢。
Ventral (or pelvic) fins correspond to the hind limbs of a quadruped.
带指甲或爪的动物的足，尤指四足动物的爪。
The nailed or clawed foot of an animal, especially of a quadruped.
这在四足纲动物中是相当普遍的现象。
毕加索的画和他的生活一个样，满是四足动物和鸟儿。
Picasso's art was as populated with animals and birds as his life.
实际上，两足动物的行走可能比四肢的行走花费更少的力气。
Walking as bipeds might actually use less energy than movement on all fours does.
在好奇围观者的众目睽睽之下，这只老虎一会儿藏在树丛中，一会儿又“裸奔”在人行道上——煞有四足动物之介事地逃离猎手们的追捕。
In front a crowd of amazed onlookers, the "tiger" hid in bushes and ran down walkways - quite skillfully for a quadruped - trying his best to evade his captors.
鸟类的祖先很可能是一种具鳞的小型四足爬行动物，生活在森林的树冠上，经常从一棵树跳到另一棵树上。
Imagine the ancestors of birds as small, scaly, four-legged reptiles living in forest canopies, leaping from tree to tree.
许多原始生物灭绝，鲨鱼和硬骨鱼成为水域的主人，四足动物最终进化成了恐龙和哺乳动物，征服了陆地。
Many primitive lineages went extinct as sharks and bony fish became masters of the waters and tetrapods, the four-legged animals that eventually evolved into dinosaurs and mammals, conquered the land.
“我们跑得没某些四足动物快，我们肯定适应在极端的温度下跑上非常长的时间，马拉松赛跑者证明了这一点”Helton说。
"While we are not as fast as some quadrupeds, we are definitely well adapted to running for very long durations under extreme thermal stress, as marathon runners attest," Helton said.
伟大的解剖学家法国人乔治·居维叶(GeorgesCuvier)早在1812年就下定论说，在当代，发现大型四足动物新物种的可能性越来越小。
The great French anatomist Georges Cuvier thought so as early as 1812, discounting the likelihood of "discovering new species of the larger quadrupeds" in the modern world.
熟料他话音未落，探险家们就陆续发现了大猩猩、霍加皮鹿、俾格米河马、大熊猫以及科莫多龙等许许多多的大型四足动物，用铁一般的事实反驳了他的论断。
Then explorers discovered the gorilla, the okapi, the pygmy hippo, the giant panda and the Komodo dragon, among many others.
麒麟是一种四足动物，它是吉祥的象征。所以和龙、凤、麒麟有关的词语都是褒义词。
Kylin, a quadruped, is an auspicious symbol. Therefore, the words concerned with these three animals are commendatory.
因此，当一个新的婴儿是引入一个家庭中，它可以是一个富有挑战性的时间，我们敬爱的四足动物。
Thus, when a new baby is introduced into a family, it can be a challenging time for our beloved four legged creatures.
'掌骨'。' '四足动物前脚所对应的部分。
这是为任何东西像是人，有动画的柱子，四足动物之类设计的。
This is for anything like creatures, animated props, four-legged animals, etc.
力克最初的设计灵感来源于布拉塞龙，一种粗壮、有獠牙的四足动物，生活在三叠纪。
The initial designs of the reek were inspired by Placerias, a stout, four-legged tusked species from the Triassic era.
虽然生物学家能轻易让四足动物在侧腹长出额外的肢，在颈部却做不到。
Although biologists can easily induce extra limbs to grow on the flank of a tetrapod this cannot be done in the neck.
虽然生物学家能轻易让四足动物在侧腹长出额外的肢，在颈部却做不到。
Although biologists can easily induce extra limbs to grow on the flank of a tetrapod, this cannot be done in the neck.
后腿腱四足动物跗关节后的一个大肌腱。
大象是世界上最大的四足动物。
The elephant is the largest four - footed animal in the world.
大象是世界上最大的四足动物。
The elephant is the largest four-footed animal in the world.
克拉克是英国剑桥大学的科学博士与脊椎动物古生物学的高级讲师，研究四足动物起源已超过25年。
JENNIFER A. CLACK, a Reader in vertebrate paleontology and doctor of science at the University of Cambridge, has been studying tetrapod origins for 25 years.
克拉克是英国剑桥大学的科学博士与脊椎动物古生物学的高级讲师，研究四足动物起源已超过25年。
JENNIFER A. CLACK, a Reader in vertebrate paleontology and doctor of science at the University of Cambridge, has been studying tetrapod origins for 25 years.
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