all mammals would have the ability to talk.所有的哺乳动物都应具有讲话的能力

ability to有 ... 的能力

I don't doubt your ability to do the work.

我不怀疑你有能力担任这项工作。

Do you confide in our ability to do this work?

你相信我们干得了这件工作吗？

because any of these animals that we've looked at are able to lower the larynx因为我们所观察的这些动物都可以将喉部位置降低

able to 能做 ...

I may be able to help you in some way.

我也许可以从某个方面去帮助你。

He was able to cast off such an uninteresting task.

他终于摆脱了这么一项乏味的工作。

I had to speak to both those...我不得不对二者都讲一下

speak to对 ... 讲话； 同 ... 交谈

I'd like to speak to you for a moment.

我想和你谈一会儿。

It's only a waste of time to speak to her.

和她说话纯粹是浪费时间。