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.
鲸鱼是世界上最大的哺乳类动物。
鲸不是鱼，而是哺乳类动物。
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.
哺乳类起源于中生代宛若原始的爬虫类。
Mammals arose from a fairly primitive reptile in the Mesozoic era.
一些哺乳类动物的例子是人类，猪和狗。
当恐龙在六千五百万年前消失后，哺乳类便兴盛起来。
When dinosaurs disappeared about 65 million years ago, mammals thrived.
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.
鸟类和哺乳类靠质生存,而非以量取胜，这与鱼类和两栖类不同。
Birds and mammals invest in quality and not quantity, as opposed to fish and reptiles.
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.
那么，哺乳类动物耳蜗毛细胞破坏后是否具有再生能力?。
Then, whether mammalia animal cochlea hair cells possess regenerative ability after being destroyed is disputed.
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.
哺乳类还要复杂，不过，即使是它们都可能适合这种灭绝建模。
Mammals are more complex still, but even they might be amenable to this sort of extinction modeling.
这些危险组包括1/8鸟类，1/5哺乳类，1/4珊瑚和1/3两栖类。
That troubled group included one in eight of the bird species, one in five mammals, one in four corals and one in three amphibians.
大象是陆地上最大的哺乳类动物，除了人类之外几乎没有其他的天敌。
An elephant, which is the earth's largest land mammal, has few natural enemies other than human beings.
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.
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.
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.
你几乎什么东西都吃，尤其在广东，包括各种哺乳类，爬行动物，昆虫等。
You eat almost anything, which, especially if you are in Guangdong, includes a variety of mammals, reptiles, and insects.
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."
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.
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.
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.
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.
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