their efforts failed
他们的努力失败了
以上为机器翻译结果，长、整句建议使用 人工翻译 。
But their efforts failed.
但他们的努力白费了。
youdao
The local communities have failed in their efforts to cope with unemployment.
当地社区未能解决失业问题。
Despite their best efforts, though, the Beatles failed. (they ended up buying another island, which they sold a few months later).
尽管尽了最大努力，披头士们还是失败了(他们最后买了其他的一个岛，几个月后就卖了)。
Their efforts failed. In eighteen ninety-nine, Germany took control of Samoa's large western islands.
VOA: special.2010.07.08
Most efforts to curb their spread have failed, and many people resort to killing the toads with poison gases or by freezing them.
VOA: standard.2010.02.07
WHITEHOUSE: Weekly Address: Letting Wall Street Run Wild Again
The fighting was so intense, their best efforts often failed.
FORBES: Remembering the Road to Baghdad
Despite all their efforts, the protesters failed to destroy the crop, which was re-planted by the farmer.
BBC: GM crops: A bitter harvest?
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