be of no avail
⇒ 我们怎么劝都无济于事,她还是哭个不停。
However hard we tried to pacify her, it was to no avail — she still couldn't stopcrying.
英语词典包含298861条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。