让赖歇特感到吃惊的是，他发现哺乳类的两块耳骨与爬行类颚部的一些骨片相吻合。
He was astonished to find that two of the ear bones in mammals corresponded to pieces of the jaw in reptiles.
舒宾写道：“结论不可避免：构成爬行类颚部一部分的鳃弓，同样也构成了哺乳类的耳骨。”
Shubin writes: "the conclusion was inescapable: the same gill arch that formed part of the jaw of a reptile formed ear bones in mammals."
约有20%的海生群落以及多数类似哺乳类的生物，很多大型的两栖动物，和所有的非恐龙的祖龙都灭绝了。
About 20 percent of all Marine families went extinct, as well as most mammal-like creatures, many large amphibians, and all non-dinosaur archosaurs.
该疾病能够在不同的哺乳类物种之间传播。
The disease can spread from one mammalian species to another.
哺乳类动物的例子有人类，猪和狗。
科学家指出，这些食肉动物只生活在群岛中的四个小岛上，那里的猎物基数太小，哺乳类食肉动物无法生存。
These carnivores live only on four small islands in the archipelago where, scientists note, the prey base is too small to support mammalian carnivore.
这项发现也隐隐地证明虱子的哺乳类和鸟类宿主在恐龙统治结束之前已经开始繁盛并进化出新物种。
The finding implies that their hosts, both mammals and birds, had also begun to flourish and speciate before the reign of the dinosaurs was over.
鸭嘴兽介于哺乳类与爬行类之间，因为它仍然具备许多爬行动物的特征，如产卵，而这些特征在我们身上已经消失了。
And that puts them somewhere between mammals and reptiles, because they still maintain quite a lot of reptilian characteristics that we've lost, for instance they still lay eggs.
H5N1病毒似乎扩大了宿主范围，导致以往被视为对禽流感病毒具有抵抗力的哺乳类动物的感染和死亡。
H5N1 appears to have expanded its host range, infecting and killing mammalian species previously considered resistant to infection with avian influenza viruses.
鸡被作为卵生动物的代表，一些已经灭绝的爬行动物可能在进化过程中将基因传给了鸭嘴兽和其他哺乳类。
Chickens were included to represent egg-laying animals, such as extinct reptiles, that passed on much of their DNA to the platypus and other mammals in the course of evolution.
雪貂是另一种已知易受感染的哺乳类动物物种。
Ferrets are another mammalian species known to be susceptible to infection.
相对立的观点则认为哺乳类和鸟类在恐龙灭绝之后才成功并演化为各种不同的物种。
The opposing view is that mammals and birds did not become successful and radiate into many different species until after the demise of the dinosaurs.
而另一类哺乳类海洋掠食物种——海豚——则是使用声音去“察看”那些几乎没有光线照射到的地方。
Those other mammalian Marine predators, the dolphins, use sound to "see" in places where little light penetrates.
现在他们明白了呵欠对于鸟类和哺乳类来说起到了散热器的作用。
It's now believed yawning operates like a radiator for birds and mammals.
研究人员们最近估计，到本世纪中叶，哺乳类动物的物种数量将从目前的5500种上升至7500种。
Researchers recently estimated that the total mammal species count will rise from about 5, 500 now to 7, 500 by mid-century.
研究人员们最近估计，到本世纪中叶，哺乳类动物的物种数量将从目前的5500种上升至7500种。
Researchers recently estimated that the total mammal species count will rise from about 5,500 now to 7,500 by mid-century.
从心理学角度看，动物进化趋向于对自己的亲人有益，特别是自己的孩子，以鸟类和哺乳类为代表。
From a psychological point then, animals have evolved to be nice to their kin, particularly their children, and particularly in birds and mammals.
少数江豚—小而结实，嗅觉迟钝的哺乳类动物—和一只白暨豚一起被转移到一个自然保护区。
A few finless porpoises — smaller, stouter mammals with blunt noses — were moved into a reserve, along with one baiji.
科学家知道体型庞大的哺乳类们在恐龙灭绝后的几百万年就进化了出来。
Scientists knew that extremely large mammals evolved within a few million years after the end of the dinosaurs.
大象是唯一一种不会跳的哺乳类动物。
我们对一夫一妻制的理解主要来自鸟类而非哺乳类。
Our understanding of monogamy draws heavily on birds rather than mammals.
大象是唯一一种不会跳的哺乳类动物。
为此他们搜集了35种长寿禽类和哺乳类动物的相关数据。
To do so, they collected the relevant data for 35 species of long-lived birds and mammals.
伴随着排放物和医学废料，抗生素和激素进入了海鸟及海洋哺乳类动物的生存环境。
Through sewage and medical waste, antibiotics and hormones enter the systems of seabirds and marine mammals.
除了这种狼之外，实在没有一个单一的哺乳类动物物种是原产于福克兰群岛的，该群岛位于南美洲东南端300英里外。
Indeed, not a single mammal species other than the Wolf was native to the Falkland Islands, located 300 miles off the southeastern tip of south America.
大阪大学的研究员内村有邦说：“通过调查这种鸟鸣一样的叫声对其他老鼠的影响，可能有助于推动对哺乳类动物语言交流进化的研究。”
"Studying the effects of the chirping sound on other mice could promote research into the evolution of mammalian verbal communications," said Arikuni Uchimura, the researcher from Osaka University.
与哺乳类不同，它们的增食欲素系统只需要在夜间管理睡眠。
Unlike mammals, they only need their hypocretin system to regulate sleep at night.
与哺乳类不同，它们的增食欲素系统只需要在夜间管理睡眠。
Unlike mammals, they only need their hypocretin system to regulate sleep at night.
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