单词avail
n.: 效用；收益
v.: 有用；有帮助；有益；利用（尤指机会、提议等）
网络: 有益于；利益；有利于
有帮助；有益；有用:
to be helpful or useful to sb
利用（尤指机会、提议等）:
to make use of sth, especially an opportunity or offer
没有什么效果；不成功:
with little or no success
没有什么用处；没有用:
of little or no use
好处
〔古语〕利益,收益
效用〔现多用于成语中〕
效用;利益
有效
使对某人有利〔有益〕
会奏效的,有…用
〔多用否定结构〕有益于,有利于,有助于
过去分词：availed
现在分词：availing
第三人称单数：avails
n.benefitadvantagerewardgainpurpose
The right to be heard would be, in many cases, of little avail if it did not comprehend the right to be heard by counsel.
受听案子的权利，如果不包括让律师听案的权利的话，在很多情况下没有什么意义。
It is a hundred to one if I should avail myself of it four times in a year.
我怀疑我在一年之内会不会使用这种特权四次（那可能性我估计还不到百分之一）。
To avail these facilities from outside is often too expensive.
从“工寮”外面得到这些设施一般是极为昂贵的。
You will find that as the souls of Light put themselves in places of authority, the dark Ones will try to block them, but to no avail.
你们会发现由于光之灵魂们把自己放置在自我权力的位置时，黑暗势力将试图阻挡他们，但是完全没有效果。
She insisted that you were coming to visit her last night too, so she had me scouring the hospital halls looking for you to no avail.
她坚持说你昨天晚上就来探望过她，因此她让我把医院的大厅都收拾干净等你。
Maybe you know from experience that trying to change yourself doesn"t work. You"ve read self-help books to no avail.
从过去的经历，你或许也知道，尝试改造自己是行不通的，就是钻研自助书籍也无济于事。
Lose money playing games, video game room to ask the boss to no avail in the case, Pingmou even spilled gasoline ignited in his head.
打游戏输钱，在向电玩室老板索要无果的情况下，冯某竟然将汽油泼洒在自己的头上点燃。
He said he offered thousands of yuan to gain her admission, to no avail.
他说他为了女儿的转学已经花了几千块钱，然而都无济于事。
Britain has never been a nation to hide at the back. But even if we were, it wouldn"t avail us.
英国从来就不是一个明哲保身的懦弱国家，但即便英国过去是，那也没有给我们带来好处。
He did not omit to avail himself of the opportunity, cautiously and briefly: too cautiously to betray his presence by the slightest noise.
他没有错过这个机会，谨慎而且迅速；谨慎得一点声音都没有，免得让人知道他来了。