unavailing

音标发音

• 英式音标 [ˌʌn.əˈveɪ.lɪŋ]
• 美式音标 [ˌʌn.əˈveɪ.lɪŋ]
• 国际音标 [,ʌnə'veiliŋ]
• 英式发音
• 美式发音

基本解释

• adj. 无效的；徒劳的；无益的；无用的

同根派生

英汉例句

• Efforts to reach the people named in the report proved unavailing.
  联系过报告中所提到的那些人，但都徒劳无功。
• Their efforts were unavailing.
  他们的努力都付诸东流。
• 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.
• Their efforts were unavailing.
  他们的努力都付诸东流。
• Efforts to reach the people named in the report proved unavailing.
  联系过报告中所提到的那些人，但都徒劳无功。

英英字典

剑桥英英字典

• When an attempt to do something is unavailing, it is unsuccessful or has no positive effect.

柯林斯英英字典

• An unavailing attempt to do something does not succeed.

专业释义

管理学

• 无效的