For years, palaeontologists have wondered if the same was true of plesiosaurs.

数年来，古生物学家一直想知道蛇颈龙是否也通过怀胎方式繁。

When an animal leaves more offspring, its genes will spread.

当动物繁出更多时， 就意味着它们的基因得到传播。

So it was an appropriate and good thing to bring them into captivity, to try to breed them, have a reintroduction program, if we care about protecting biodiversity.

因此，如果我们关心保护生物多样性的话，把它们圈养起来，繁，进行重新引进计划，是一件适当而有益的事情。

At that age, they reach sexual maturity, meaning the fish were able to produce young.

它们在这个年龄达到性成熟，这意味着它可以繁。

The hope is that the oysters will help clean the water and also have babies.

人们希望这些牡蛎能够帮助清海水并繁。

Question 2. To mate and then produce young animals.

交配，然繁。

And she added that it also allows them to reproduce more throughout their life.

“这也让它们在一生可以中繁更多的。”

First, some organisms reproduce asexually, so they don't need other organisms to produce offspring.

首先，有些生物是无性繁的，所以它们不他生物来繁。

The remnants of his vast web were still there, but the swarms of descendants he had spawned had been driven out by the Death Eaters, to fight for their cause.

它那张残缺不全的巨网还在，但它所繁的那群已被食死徒赶去为他们战斗了。

Now you'd have to ask, well, that seems a little bit paradoxical, because maybe the parasite wants to have more rabbit establishing rather than less.

“现在你不禁发问，这似乎有点矛盾，寄生虫不是应该希望繁更多，而不是减少数量吗？”

Or you can go the other way and make tons and tons of babies, but you won't have the resources left to take very good care of them.

你也可以选择另一种方式繁大量的，那你就没有足够的能力来照顾好它们。

They thought only of themselves and reproduced until the world was full of them, crawling about but having no higher purpose than feeding and mating.

它们只考虑自己，繁直到世界上到处都是它们，它们爬来爬去，除了觅食和交配，没有别的更高的目的。

So on one end, we divide by species, which is a group of all the animals of the same type that can breed together over multiple generations.

所以一方面，我们按“种”划分，这是一组所有相同类型的动物，它们可以一起繁。

For hundreds of years, Lake Tuz has been home to huge groups of flamingos that travel and reproduce there when the weather is warm.

数百年来，图兹湖一直是大群火烈鸟的栖息地，天气暖和的时候，它们就会迁徙到这里并在这里繁。

One of the core tenets of Darwin's theory is that more offspring are always produced for a species than can possibly survive.

繁出的多余能生存下来的。

Unlike most other kinds of fish, they are not able to reproduce for several years, and also produce fewer young.

与大多数他种类的鱼不同，它们在数年内都无法繁，而且也更少。

Only those rats given the saline sired offspring.

只有那些注射了生理盐水的老鼠能繁。

And he'll spend the next three years on the sea before eventually returning to breed as a breeding adult.

他将在海上度过接下来的三年，最终以成年海鹦繁的身份返回陆地。

By 1511, every ship leaving the Americas for Spain was ordered to bring back five breeding pairs.

到1511年，每艘离开美洲前往西班牙的船只都被命令带回五对可以繁的火鸡。

At best, their dietary rigidity could limit their ability to reproduce or to care for their young.

即便作最乐观的估计，它们这种僵化的食谱也会限制它们的繁能力或扶养的能力。