我们今天在课堂上学了有关哺乳动物的知识。
相比于爬行动物，哺乳动物的这一特性更加典型。
从那种意义上来说，比起其他爬行动物的大脑它们更接近哺乳动物的大脑。
In that sense, they are closer to mammals' brains than other reptiles' brains.
我们甚至与鸟类等非哺乳动物的远亲一样，拥有某种基于本能的基本数量推理能力。
We even share some basic instinctual quantitative reasoning with distant non-mammalian relatives like birds.
那些巨型哺乳动物的饮食是最需要多样性的。
The great beasts were the ones that needed the most diversity in their diet.
唯一明确的解释是人类的过度捕猎导致了各种哺乳动物的灭绝。
The only clear explanation is that humans caused the extinction of the various mammal species through excessive hunting.
这种夜间的“交易”也许可以一直追溯到所有哺乳动物的祖先身上。
It is probable that the nocturnal trades a way back in the ancestry of all mammals.
许多哺乳动物的奶含有大麻素，这种物质可以刺激大脑中的某些受体。
The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain.
数量的周期循环是小型哺乳动物的特征，它们有时似乎是由捕食者造成的。
Population cycles are characteristic of small mammals, and they sometimes appear to be brought about by predators.
它还有一条细长的尾巴，这是哺乳动物的典型特征，今天的鲸鱼没有保留这一特征。
It also had a long thin tail, typical of mammals, something we don't see in today's whales.
今天，我想看看哺乳动物的一些交流系统，尤其是灵长类动物，比如猩猩，黑猩猩，大猩猩。
Today, I'd like to look at some communication systems found in mammals, particularly in primates, such as orangutans, chimpanzees, gorillas.
巨噬细胞是在小鼠和其他哺乳动物的免疫系统对细菌等侵入性生物的反应中发挥作用的细胞。
Macrophages are cells that play a role in the response of the immune system of mice and other mammals to invasive organisms such as bacteria.
一根骨头是来自牛一般大小的哺乳动物的肋骨；另一根是来自山羊一般大小的哺乳动物的腿骨碎片。
One bone was a piece of rib from a cow-sized mammal; the other, a leg bone fragment from a mammal the size of a goat.
当哺乳动物的孩子们在附近时，独有的边缘皮层向家长传递温柔和温暖的感觉，促使哺乳动物去养育后代。
Unique to mammals, the limbic cortex impels creatures to nurture their offspring by delivering feelings of tenderness and warmth to the parent when children are nearby.
对非外来物种的研究没有得到类似的结果，这使得研究人员推测鸟类的社会学习能力可能与哺乳动物的社会学习能力有根本性的区别。
Studies on nonalien species have not produced similar results, leading researchers to speculate that avian social learning may be fundamentally different from that of mammals.
溶组织内阿米巴更喜欢吞噬高等哺乳动物的红细胞而不是吞噬鸡的红细胞。
Entamoeba histolytica prefers engulfing erythrocytes of higher mammals to chicken erythrocytes.
草地较之哺乳动物的大脑更复杂吗？
显然哺乳动物的一夫一妻制天性很薄弱。
部分原因事因为哺乳动物的牙齿保存的十分完好。
哺乳动物的化石纪录比别的类别的好的多。
There is a much better fossil record for mammals than for many other groups.
因此，辣椒素引发哺乳动物的痛觉感受似乎纯属偶然。
The fact that capsaicin causes pain to mammals seems to be accidental.
动物一齐从配备有西班牙家具的哺乳动物的房间消失。
The animals unanimously vanished from the mammal's room furnished with Spanish furniture.
人类或哺乳动物的细胞更有可能被诱导来做同样的事情。
There's a higher chance that human or mammalian cells can be induced into doing the same thing.
贝尔科那普最初发现这块较大哺乳动物的骨头时感到吃惊。
Belknap was initially surprised to find the bone of a larger mammal.
象比其他哺乳动物的妊娠期更长——将近22个月。
Elephants have a longer pregnancy than any other mammal-almost 22 months.
哺乳动物的境况好些，只有九分之二显著受油污染。
Mammals fared better, with two out of nine live mammals collected visibly oiled.
蚂蚁的肌肉和哺乳动物的肌肉在许多方面都很不相同。
A. Ants' muscles are not unlike those of a mammal in many ways.
唯一制约他们演化为超级大哺乳动物的原因是气候和有限的食物资源。
The only thing that prevented truly mega-mammals from evolving were climate and available food resources.
好消息是，这个哺乳动物的大脑同样也包含了唯一用于保持爱情的部分。
The good news is that the ancient mammalian brain is also home to the only part of the brain that can stay in love.
好消息是，这个哺乳动物的大脑同样也包含了唯一用于保持爱情的部分。
The good news is that the ancient mammalian brain is also home to the only part of the brain that can stay in love.
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