ADJ-GRADED 无益的;无用的;徒劳的 If you say that something is futile, you mean there is no point in doing it, usually because it has no chance of succeeding. 无益的;无用的;徒劳的
He brought his arm up in a futile attempt to ward off the blow.
他扬起胳膊徒劳地想要挡住这一拳。
It would be futile to sustain his life when there is no chance of any improvement.