His efforts at solving the problem failed.

他企图解决这一问题的努力失败了。

《新英汉大辞典》

This was not only true of his experience at home, but of his failed efforts to turn Dionysius' kingship in Sicily into a successful example of philosophical rule.

这不仅验证于他的国内经历，也验证于他无力，助迪欧尼修斯将西西里王权，转为成功之哲学统治的过往。

youdao

In spite of all of his efforts he failed.

尽管他作了种种努力，但还是失败了。

youdao

His efforts failed. The treaty was defeated.

VOA: special.2010.02.18

This was not only true of his experience at home, but of his failed efforts to turn Dionysius' kingship in Sicily into a successful example of philosophical rule.

这不仅验证于他的国内经历，也验证于他无力,助迪欧尼修斯将西西里王权,转为成功之哲学统治的过往。

耶鲁公开课 - 政治哲学导论课程节选

Despite his efforts, Surrey failed to reach the Twenty20 Cup quarter-finals.

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Even had Garfield served a full term, his efforts would almost certainly have failed.

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