玩耍似乎是具有相当复杂的神经系统的动物（主要是鸟类和哺乳动物）的一种发育特征。
Play appears to be a developmental characteristic of animals with fairly sophisticated nervous systems, mainly birds and mammals.
就像鸟类和哺乳动物吃鱼和昆虫，你可以看到树木和植物开始在静水附近生长，而不能生长在流动的水附近。
Like birds and mammals that eat the fish and insects, and you get trees and plants that begin to grow near the standing water that can't grow near the running water.
恒温动物是指诸如现代鸟类和哺乳动物这种可以保持体温恒定的动物。
Endotherms are animals such as modern birds and mammals that keep their body temperatures constant.
它对很多鸟类和哺乳动物很有益，甚至还会让人观察到意想不到的物种。
It will be helpful to many species of birds and animals, even some unexpected species which are wonderful to observe.
科学家估计，每过24小时，就有150至200种植物、昆虫、鸟类和哺乳动物灭绝。
Scientists estimate that 150-200 species of plant, insect, bird and mammal become extinct every 24 hours.
据研究人员估计，每年被家猫杀死的鸟类和哺乳动物仅在美国就多达数十亿。
Researchers now estimate that each year, domestic cats kill billions of birds and mammals in the United States alone.
综述了社群学习对植食性鸟类和哺乳动物觅食行为的作用，并述评了其学习机制。
This paper reviews the effects of social learning on foraging behavior in herbivorous birds and mammals and the underlying mechanisms.
美国杜克大学的生物学家指出蜥蜴有鸟类和哺乳动物拥有的创造性的解决问题的能力。
Biologists from Duke University report that lizards have some of the same creative problem-solving abilities that birds and mammals do.
许多恐龙的足迹显示它们的行动与鸟类和哺乳动物一样快，比一般的爬行类要快得多。
Many dinosaur track - ways show that dinosaurs walked as fast as do birds and mammals, and much more rapidly than can be sustained by reptiles.
研究人员发现，鸟类和哺乳动物确实有着不同的大脑组织。但是在大脑结构上有相似之处。
The researchers found that the brains of birds and mammals do have different structures. But there are also similarities in the brain architecture.
现在，许多曾经处于灭绝边缘的物种如鸟类和哺乳动物，包括猎豹和美洲狮，正在陆续回到这一地区。
Now, many species of formerly endangered birds and mammals, including leopards and pumas, are returning to the region.
禽流感病毒可感染许多鸟类和哺乳动物，但是其自然宿主范围通常限于野生水禽，如野鸭、海鸥等。
Avian influenza virus can cause serious disease in a wide variety of birds and mammals, but generally its natural host range is limited to wild ducks and gulls.
人类对生物体的直接开发利用，例如狩猎和收获，让三分之一以上列入名录的鸟类和哺乳动物受到威胁。
Direct human exploitation of organisms, such as through hunting and harvesting, threatens more than a third of the listed birds and mammals.
但是，由于在陆地上不需要这样的电子磁场探测系统，爬行类动物，鸟类和哺乳动物都渐渐失去了这一功能。
However, over the years reptiles, birds and mammals lost their electrosense as it wasn’t needed for life on terra firma.
这些结果与上个月新加坡国立大学的研究结果相左，那个研究发现因为全球变暖，鸟类和哺乳动物都在缩小。
The findings are at odds with research from the National University of Singapore last month, which found birds and mammals are shrinking because of global warming.
一方坚持认为：鸟类大脑内部联系的方式和哺乳动物大脑一样，而鸟类和哺乳动物的智力都来自这种大脑内部的联系；
One holds that birds' brains make the same kinds of internal connections as do mammalian brains and that intelligence in both groups arises from these connections.
一方坚持认为：鸟类大脑内部联系的方式和哺乳动物大脑一样，而鸟类和哺乳动物的智力都来自这种大脑内部的联系；
One holds that birds' brains make the same kinds of internal connections as do mammalian brains and that intelligence in both groups Reinforced Plastics Mortar Pipe from these connections.
这些来自6个国家的29位鸟类学家研究了7年后，提出了一套新的、更准确的鸟类和哺乳动物大脑各种组织结构的名称。
The consortium of 29 scientists from six countries met for seven years to develop new, more accurate names for structures in both avian and mammalian brains.
生物学家找到了一种观察到1亿3千万年前的历史的方法，让我们去了解恐龙灭绝而鸟类和哺乳动物繁荣起来的那段充满灾难的时期。
Biologists have found a new way to peer back 130 million years in time, illuminating the catastrophic period in which the dinosaurs perished and birds and mammals arose.
如今，蛇已经与包括鱼类、两栖动物类、爬行动物类、鸟类和哺乳动物类中的不少种类一样，成为一个数量正在急剧下降的动物种类。
Snakes now join a list of declining animal populations that includes fish, amphibians, reptiles, birds, and mammals.
“如果我们只研究鸟类和哺乳动物，那么我们只能从这两类动物中得到信息，”他说，“爬行动物是我们应该研究的另一个独特类别。”
"If we only study birds and mammals, we're only going to learn from those groups," he said. "This is one more distinct group we need to learn about."
恐龙的骨骼结构表明它们不同于现代的爬行动物，它们的生长速度像鸟类和哺乳动物一样快这与越来越多证明恐龙是温血动物的证据相吻合。
The bone structure of dinosaurs shows that, unlike modern reptiles, they grew as fast as birds and mammals — which dovetails with a growing body of evidence that dinos were, in fact, warm-blooded.
事实上，温带雨林和热带雨林各自像富有生气的动物管弦乐队，昆虫、爬行动物、两栖动物、鸟类和哺乳动物会发出瞬时和有条理的声调。
In fact, temperate and tropical rainforests each produce a vibrant animal orchestra, that instantaneous and organized expression of insects, reptiles, amphibians, birds and mammals.
Haussler博士想测序1万种脊椎动物的基因组，这个数目也即是包括鱼类，两栖类，爬行类，鸟类和哺乳动物等所有物种总数的六分之一。
Dr Haussler wants to sequence 10,000 vertebrates, a sixth of the total number of species of fish, amphibians, reptiles, birds and mammals.
刚出生的幼体真的很脆弱，尤其是刚出生的鸟类和小型哺乳动物。
Hatchlings are really vulnerable, especially to birds and small mammals when they are born.
在人类出现很早以前，地球上就出现了鱼类、爬虫类、鸟类和一些哺乳动物。
Long before Man lived on the Earth, there were fishes, reptiles, birds, insects, and some mammals.
它们是一组引起哺乳动物和鸟类疾病的病毒。
They are a group of viruses that cause diseases in mammals and birds.
最大胆的推断是，它甚至可能有一定程度的智力—因为最聪明的哺乳动物和鸟类一般都是群居性的。
Most speculatively, it might even imply a degree of intelligence—for the most intelligent mammals and birds are generally those that live in groups.
最大胆的推断是，它甚至可能有一定程度的智力—因为最聪明的哺乳动物和鸟类一般都是群居性的。
Most speculatively, it might even imply a degree of intelligence—for the most intelligent mammals and birds are generally those that live in groups.
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