This chicanery can range from relatively benign but useless efforts to overly aggressive promotion to outright fraud.

这样的欺骗手段可以相对无害地提升排名，但是这种急功近利地推销无疑是一种欺诈行为，是无用之功。

youdao

Words are useless to describe my efforts to know my own children. But my great debt to them for their understanding of me is one I have often failed to repay.

我为了解孩子们所做出的努力远非文字所能形容，而孩子们对我的理解更让我无以为报。

youdao

All the efforts of the police to break through the human ring were useless.

警察为突破这个人群圈子所做的一切努力都是无用的。

youdao

China is also worried that its strategic nuclear arsenal could be rendered useless by American efforts to build a missile defence system that includes space-based components.

ECONOMIST: China admits shooting down a satellite

It can be downright infuriating to have mana run out mid-battle and realize your efforts to this point have been useless.

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