Their attempts were unavailing.

他们的尝试都徒劳无功。

金山词霸

Despite numerous attempts, contacting the individuals mentioned in the document remained unavailing.

尽管多次尝试，联系文件中提及的那些人依然无果。

金山词霸

He made unavailing efforts to overcome the incurable disease before passing away.

他试图战胜这种不治之症，但努力都是徒劳的，最终离世了。

金山词霸

Their attempts were unavailing.

他们的尝试都徒劳无功。

金山词霸

Disconsolate, Soapy ceased his unavailing racket.

索比怏怏不乐地停止了白费力气的闹嚷.

英汉文学 - 欧亨利

Operation was performed 17 days later after invalid anticoagulant treatments and unavailing catheter fragmentation.

经过检查确定是大量肺栓塞,但是经过内科用肝素治疗,却发生血小板过低过低的副作用.

期刊摘选

His best efforts, however, proved unavailing and the child died.

然而, 他所有的努力都无济于事,女儿还是死了.

期刊摘选

All our protests were unavailing.

我们的抗议全部无用.

《简明英汉词典》

Hurstwood heard the details of the weary and unavailing search that evening.

那天晚上,赫斯渥听到了这次劳而无获的寻找的详细情况.

英汉文学 - 嘉莉妹妹

Despite repeated attempts, contacting the individuals mentioned in the document remained unavailing.

尽管多次尝试，联系文件中提到的那些人依然毫无效果。

金山词霸

Despite his unavailing efforts to combat the incurable disease, he ultimately passed away.

尽管他为对抗不治之症付出了徒劳的努力，最终还是离世了。

金山词霸