Is just a chemical reaction that compels animals to breed.

不过是让繁衍后的化学反应罢了。

It's a brutal way to raise a family.

这种养育后的方式非常残酷。

Or is there something about the bromance that holds the key to reproductive success?

还是兄弟情谊是成功繁衍后的关键？

Animals which bring up or nourish their young on milk are called mammals.

依靠奶来抚养后的叫做哺乳。

That is what we owe our forebearers, one another, and generations to follow.

这是我们欠我们的祖先、我们彼此和我们后的。

She believes the forest she is planting will be a gift to future generations.

她相信她种植的森林将是给后的。

And he suspects it might have something to do with the parenting.

他怀疑这可能与郊狼养育后的方式有关。

They showed how genetic qualities are passed to living things from their ancestors.

他们展示了基因品质是如何从祖先遗传给后的。

We borrow it from our children.

而是从我们的后借来的。

But the ancestors of baleen whales had a very different diet.

但是须鲸祖先的饮食习惯与这些后的差别非常大。

In turn, their nursemaid will benefit the demanding offspring.

反过来，它们的保姆作用有助于后的健康。

If she doesn't appear soon, it could be too late for them to breed successfully.

如果雌性信天翁还不出现他们将错过顺利繁衍后的机会。

What worries Ippolito more than the business impact is the threat to future generations.

比商业影响更让Ippolito担心的是对子孙后的威胁。

Scientists have developed the technique to prevent some genetic diseases from being passed on.

学家发明这种能预防一些遗传疾病传给后的技术。

" These nutrients can then be used by future generations of life, " Marek said.

" 然后这些营养质可以被后的生命所利用。"

A British company has found a way to genetically modify mosquitoes to kill their offspring.

一家英国公司已经发现了一种通过改变蚊子基因杀死它们后的方法。

Some 80 percent of birds practice biparental care, meaning both the male and female rear their offspring together.

80%的鸟类都是奉行雌雄二鸟共同抚育后的双亲抚育。

But at this point, the mutation causing 90% male offspring would no longer be an advantage.

但基于这一点，这种能产生 90% 的雄性后的变异不再是一种优势。

These tiny bacteria and their billions of descendants changed the destiny of our planet.

这些微小的细菌及其数以亿计的后改变了地球的命运。

A gene drive is a term for genetic engineering that alters the probability of genes passed to offspring.

基因驱是基因工程的一个术语，它改变基因传递给后的可能性。