久久国产欧美日韩精品,日韩国产精品久久久久久亚洲,99视频精品全部免费免费,91精品国产综合久久走光

unavailing的音標：unavailing的英式發(fā)音音標為：[??n?'ve?l??]unavailing的美式發(fā)音音標為：[??n?'vel??]...

Efforts to reach the people named in the report proved unavailing.聯(lián)系過報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...

adj.徒勞的，無效的，無用的...