However strong you are, there's always someone stronger.; For every able person there is always one still abler.

强中自有强中手， 能人背后有能人。

《新英汉大辞典》

He be a very able person.

他是一位很能干的人。

youdao

The better able the person is to reconstruct the perspective from which the material was encoded, the more likely that recall will be successful.

一个人重构信息资料转化方式的能力越强，这种回忆过程就越有可能成功。

youdao

And it is not for me to set myself up as the one person able to answer it.

VOA: special.2009.04.18

In a less technical way, " it is helping the person to become the best that he is able to become."

通俗点讲，就是帮助一个人成为最好的自己“

哈佛公开课 - 幸福课课程节选

Suppose we say then that to be alive as a person is to be able to engage in P-functioning.

假设我们说作为人而活着,就是有人格功能性。

耶鲁公开课 - 死亡课程节选

If you aren't able to attend in person, you'll still be able to tune in to two full days of livestreamed coverage right here on Engadget.

ENGADGET: Announcing Engadget Expand, a live event and expo for gadget fans!

The issue is: is a person able to acknowledge their deficits and seek help.

CNN: Have an incompetent boss? You're not alone

"Why shouldn't people with disabilities get in through the same door as any able-bodied person, " he said.

BBC: Disabled protesters' front door battle