音標(biāo)發(fā)音英式音標(biāo) [??n.??ve?.l??]美式音標(biāo) [??n.??ve?.l??]國際音標(biāo) [,?n?'veili?]英式發(fā)音 美式發(fā)音 基本解釋adj. 無效的；徒勞的；無益的；無用的同根派生 unavailing相關(guān)詞英漢例句Efforts to reach the people named in the report proved unavailing.聯(lián)系過報(bào)告中所提到的那些人，但都徒勞無功。Their efforts were unavailing.他們的努力都付諸東流。Hurstwood heard the details of the weary and unavailing search that evening.那天晚上,赫斯渥聽到了這次勞而無獲的尋找的詳細(xì)情況.Their efforts were unavailing.他們的努力都付諸東流。Efforts to reach the people named in the report proved unavailing.聯(lián)系過報(bào)告中所提到的那些人，但都徒勞無功。unavailing更多例句英英字典劍橋英英字典 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. unavailing劍橋字典unavailing柯林斯字典專業(yè)釋義管理學(xué)無效的