陆地上的大多数动物我们都知道，但水下的许多生物却不为人所知。
Most animals on land are known to us, but many living things underwater are not.
动物界有很多精巧而美妙的生物。
从化石记录中可以了解到一些已经灭绝、但已经完全变成海洋生物的鲸目动物。
Extinct but already fully marine cetaceans are known from the fossil record.
显然，人类是动物，并且仅仅是演化而来另一种的生物。
Obviously humans are animals, and just another creature of evolution.
当然动物和生物是类似的。
It is similarly, of course, both an animal and a living thing.
因为这种生物是猫科类动物，所以它们最常见的名称wolfman并不正确。
The popular name (wolfman) is incorrect, for the creature is of the cat kind.
他们使用木材，作物废料，动物废料或煤炭等生物燃料。
They use biomass fuels like wood, crop waste, animal waste or coal.
我们是社会性动物，生物学意义上的父母并不一定要抚养孩子。
We're social animals and the biological parents do not necessarily need to raise children.
吃掉自己后代的动物，他们的基因走进了生物学的死胡同。
The animal that eats its offspring, those genes are a biological dead end.
动物粪便也含有可引起腹泻的微生物。
Animal faeces also contain microorganisms that can cause diarrhoea.
时至今日，这两种体型中等的动物始终被认为是同一种生物。
Until now, the two midsize animals were thought to be the same species.
动物的识数才能甚至可以出现在比鱼还原始的生物中。
This ability may date back to even more primitive organisms than fish.
这种海洋无脊椎动物是海洋生物链中重要的一环。
The Marine invertebrates are important links in the Marine food chain.
比如说,生物学家,或者动物学家可能会研究猫
Well, let's see, a biologist might study, or a zoologist might study, cats.
每一个生物，甚至动物，都正在寻找它。
这种巨大生物是现存体积最大的有齿动物。
保护动物，善待生物。
动物解剖实验必须佩带口罩，以免发生生物污染。
During animal dissections, you need to wear masks to prevent infections.
这样植物为生物群落里的所有动物提供了基本的食物。
Thus plants produce the basic food supply for all the animals of a community.
微生物共生对于动物的正常发育和生长是必不可少的。
Microbial symbioses are essential for the normal development and growth of animals.
在拥有耳朵的动物中，人类是唯一不能移动这一器官的生物。
Of animals possessed of ears man is the only one that cannot move this organ.
粘菌是既象动物又似真菌的一类特殊生物。
Myxomycetes are a special group with characteristics both of animal and eumycetes.
生物生活或者生长在动物的外部表面。
The animal or plant on which or in which another organism lives.
人类是生物进化史上的顶峰，是最高级的动物，这是就人类的整体功能而言的。
In general, in the evolutional history of life, Human being is the most developed animal.
人最有智慧的生物，可我们现在却连动物都不如！
Huamn beings are the most intelligent creature, but we are even worse than animals!
小鼠是生物医学研究中使用数量最多的哺乳类实验动物。
Mouse is the most popular laboratory animal in medical research.
动物王国致命的危险生物！
你看到许多海底的动物和奇异的生物体。
在生物界中，只有多细胞动物得癌症。偏偏沙鱼不得癌症。
Summary: In the animal world, many multicellular animals have cancer but sharks never get cancer.
在生物界中，只有多细胞动物得癌症。偏偏沙鱼不得癌症。
Summary: In the animal world, many multicellular animals have cancer but sharks never get cancer.
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