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"an unavailing attempt"
同义词： futile ineffectual otiose
以上来源于: WordNet
ADJ An unavailing attempt to do something does not succeed. 不成功的
Efforts to reach the people proved unavailing.
接近人群的努力被证明是不成功的。
empty , useless , unnecessary , ineffective , vain
Their efforts were unavailing.
他们的努力都付诸东流。
《牛津词典》
《柯林斯英汉双解大词典》
But all my efforts appeared unavailing.
但是，我的努力似乎是白费劲。
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This argument is particularly unavailing where counsel admitted that Defendant Lay did not draft the request.
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Under current law, UNCAT's CID terms are thus unavailing to alien enemy combatants captured and held in foreign countries during wartime.
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In an unavailing effort to placate critics, the government has said that it will increase the total number of places in colleges, to ensure that no qualified student is worse off.
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