Scientists hope the large tanks will help the animals breed.

科学家们希望巨型水箱能帮助这些生物繁殖。

So sanctuaries are a different proposition. Sanctuaries don't breed their animals.

庇护所就不一样了。庇护所不会繁殖动物。

Another plan is to breed animals based on how much methane they produce.

另一项计划是根据动物产生的甲烷数量来繁殖动物。

They show the animals to visitors, breed animals, and write about their farming experiences.

他们向游客展示动物，饲养动物，并写下他们的农业经历。

The ones that produce less methane can then be used to breed more animals.

产生较少甲烷的那些动物可以得到准许繁殖更多。

Most big predators today breed on a short interval in a year, actually most animals today.

今天的多数大型食肉动物都只在一年中的某段时期繁殖，其实如今大多数动物都这样。

Erosion is of course bad for people trying to grow crops or breed animals on that terrain.

对想要在那块地上种植庄稼或者放牧动物的人来说，土壤侵蚀当然是件坏事。

The program aided people so they could produce during a difficult season and breed animals.

该计划帮助人们在艰难的季节生产并饲养动物。

For years and years I've been trying to breed bigger and bigger animals.

多年来，我一直在努力培育越来越大的动物。

If a gene helps an animal breed when young but endangers it when it is old, the odds are that it will spread.

如果一种基因在动物年轻时有助于繁殖，但在年老时对其造成危害，那么它很可能会传播。

I will be covering about seven thousand years of human history when, as the Ice Age ended, people in many different parts of the world began to breed animals, grow plants and eat differently.

我将涵盖人类历史之河中将近七千年的历史；当冰河时代结束，全球各地的人类开始了繁殖牲畜、种植庄稼，而且饮食方式也大大改观了。

I do think that zoos should stop breeding animals that aren't a part of a sort of a legitimate conservation breeding program that has a real chance of going back out into the wild someday.

我认为动物园应该停止繁殖动物，除非是某种合法的保育繁殖计划，真的让动物将来有机会回到野外。

If that doesn't sound like science fiction enough, some companies are currently trying to breed animals to have genetic similarities to humans in hopes that their organs can be used for human transplants and not be rejected.

如果这听起来还不够科幻，那么一些公司目前正在尝试培育与人类具有相似基因的动物， 希望它们的器官可以用于人体移植而不被排斥。