Is just a chemical reaction that compels animals to breed.

不过是让动物繁衍后的化学反应罢了。

Trilobites have no direct descendants, but their evolutionary cousins are alive and well.

三叶虫没有直系的后，但它们在演化上的表亲在仍然活得很好。

I'm descended from the third brother!

我是那第三个兄弟的后！

But in hurricane-free areas, docile colonies had more babies.

但在没有遭遇飓风袭击的地区，温和蜘蛛群繁衍的后数量更多。

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

这是我们欠我们的祖、我们彼此和我们后的。

They could easily be Slytherin's descendants.

他们很可能是斯莱特林的后。

Together we can achieve a sustainable future for generations to come.

我们一起为子孙后可持续的未来。

It is the child of a donkey and a horse.

它是驴和马的后。

We're the children of this type of micro-organism.

我们是这种微生物的后。

Highly symmetrical bodies in animals might signal quality genes, and better offspring.

动物界存在的高度对称的体型可能表着高质量的基因、以及更好的后。

Which would make them and their offspring an easy meal.

这会使树蛙及其后轻易成为天敌的盘中餐。

It's a model full of danger for future generations.

这是一个危害子孙后的模式。

Such a genetic tweak would ordinarily be winnowed out by natural selection over subsequent generations.

这样的基因变异通常会在后的自然选择中被淘汰掉。

If that bacterium survives a dose of treatment, its descendants will inherit that same resistance.

如果这种细菌在一定剂量的治疗中存活下来，它的后将继承同样的抵抗力。

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礼物。

And now we have forgotten who we are.

于是们渐渐忘记了自己是航海者的后。

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

但是须鲸祖的饮食习惯与这些后的差别非常大。

Iacocca was the son of Italian immigrants.

艾柯卡是意大利移民的后。

Female black rhinos like to spend time with their offspring.

雌性黑犀牛喜欢和他们的后在一起。

And there's other descendants you might have heard of like Java and Python.

还有其他你可能听说过的后，比如 Java 和 Python。