It would be futile to protest.

抗议也无用。

《牛津词典》

We do not fight global warming because it is futile to do so.

我们不会与全球变暖作斗争，因为这样做是徒劳的。

youdao

It is always futile to try to hold back the progress of history.

要想阻止历史潮流是徒劳的。

《新英汉大辞典》

He said that it would be "futile" to expect any outcome from the resolution, because North Korea would remain "invincible forever".

VOA: standard.2009.11.20

Second of all the motif of guards who block access to the tree of life suggests that no humans have access to immortality and the pursuit of immortality is futile.

第二点，那些阻止人类接近生命树的守卫,暗示着，任何人类关于永生的尝试,最后都是徒劳一场。

耶鲁公开课 - 旧约导论课程节选

It tells you that any attempt to try to specify, to localize the position of an electron in such a system is futile.

这说明你试着任何尝试关于，使一个电子在这样一个系统中,确定其明确的位置是没有意义的。

麻省理工公开课 - 固态化学导论课程节选

Some cynics, though, say that it is futile to make arguments for good policy.

FORBES: Four Reasons Why Big Government Is Bad Government

Under these circumstances it is futile to call Dr. Mahathir to give evidence in this trial.

CNN: No Titanic Confrontation

And in the moments it took for them to descend on her, she realized it would be futile to lie.

NPR: Woman In Timbuktu Punished For Forbidden Love