futility

n.

无益；无效；无益的事；无效果的行动

1. A sense of futility stole over her.
   一种没用的感觉向她袭来。
2. She finally perceived the futility of her protest.
   她最终感到她的抵抗是无用的。
3. We see the futility of finger-pointing.
   我们认为指责毫无益处。
4. As soon as he had felt these regrets,he realized their futility.
   一有这种后悔的感觉,他马上认识到后悔是无益的。
5. He well knew the futility of trying to contend against witches.
   他十分清楚和巫婆斗没什么好处。
6. Accustomed as I am to public speaking, I know the futility of it.
   我虽然习惯公开演讲，但我却知道那是枉费心机的。

Who defines futility?
Futility and the Ethics of Resuscitation
The problem with futility
The illusion of futility in clinical practice *
The rise and fall of the futility movement.
On the futility of blind search: An algorithmic view of “no free lunch”
Prehospital traumatic cardiac arrest: the cost of futility
A randomized, double-blind, futility clinical trial of creatine and minocycline in early Parkinson disease.
Optimizing the ongoing search for new treatments for Parkinson disease: using futility designs
Prospective evaluation of patients refused admission to an intensive care unit: triage, futility and outcome.