avail
n. 效用,利益
v. 利用,有益于;有益于
第三人称单数 avails
现在分词 availing
过去式 availed
过去分词 availed
例句
The doctors tried everything to keep him alive but to no avail.
医生千方百计想使他活下来,但无济于事。
《牛津词典》
His efforts were to no avail.
他的努力是徒劳的。
《柯林斯英汉双解大词典》
Your ability to argue is of little avail if the facts are wrong.
如果论据是错的,你的辩才也就没有什么用了。