all mammals would have the ability to talk.所有的哺乳動物都應具有講話的能力

ability to有 ... 的能力

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

我不懷疑你有能力擔任這項工作。

Do you confide in our ability to do this work?

你相信我們干得了這件工作嗎？

because any of these animals that we've looked at are able to lower the larynx因為我們所觀察的這些動物都可以將喉部位置降低

able to 能做 ...

I may be able to help you in some way.

我也許可以從某個方面去幫助你。

He was able to cast off such an uninteresting task.

他終于擺脫了這么一項乏味的工作。

I had to speak to both those...我不得不對二者都講一下

speak to對 ... 講話； 同 ... 交談

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

我想和你談一會兒。

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

和她說話純粹是浪費時間。