英汉词典

1. 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.

    e.g. 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。
    e.g. It would be futile to sustain his life when there is no chance of any improvement.
           如果没有任何好转的机会，继续维持他的生命也是无益的。