abortive
单词辨析：
指努力、希望、搜寻等未能获得想要的结果的。
He underwent a knee operation in the vain hope of getting into the team.
他做了膝盖手术，徒劳地指望能进入该队。
She raised her head in a vain attempt to hold back the tears.
她仰起头，却无法忍住眼泪。
指行动、计划等没有成功的。
an abortive takeover bid by the larger firm
由较大公司提出的夭折了的并购
There is no record of the abortive military coup.
没有关于那次未遂的军事政变的记录。
尤指付出很多努力却无成效的。
So far, their research has been fruitless.
到目前为止，他们的研究工作毫无结果。
The fruitless attempt to settle the dispute disappointed him.
试图解决争端的努力白费了，这让他很失望。
侧重指人或事物未能发挥应有之作用的。
The army has proved ineffective in protecting the local civilians.
军队没有起到保护当地平民的作用。
This special stain remover was almost ineffective in removing the soup stain.
这种特效去污剂基本去不掉汤渍。
The policy proved ineffective in dealing with the problem.
事实证明该政策未能解决问题。
相关例句：
While I had the technician on the Ie, I e-mailed him a PDF of my abortive scan.
当我在与技术人员交谈的时候，我给他发了一封我异常中断扫描仪的PDF文档。
Both abortive rate and vertical transmission rate arose with the increasing of T.
流产率和垂直传播率都随着接种速殖子数量的增加而升高。
This last attempt proved to be abortive.
这个最后的尝试被证明是白费了。
Division of mature pollens abortive stage and shape were also discussed in this paper.
本文还讨论了成熟花粉粒败育时期和败育形态的划分。
That was an abortive attempt. They were baffled in their test.
这是一种失败的尝试。他们的测验失败了。
All efforts to trace and locate her next of kin proved abortive.
一切努力追查并找到其亲属的证明流产。