avail someone nothing of little (或 no) avail to li
(archaic)(of an action) be of no help at all to someone(古)（行動）無助于not very (or not at all) effective or successful幾乎（或根本）無效的with little (or no) success or benefit幾乎（或根本）毫無作用；無助
avail (oneself) of
To make use of.利用
英語四級真題
This enables him to reinterpret British cuisine depending on what is avail able in the local markets.
出自-2011年6月閱讀原文
柯林斯高階英漢雙解學習詞典釋義
PHRASE
毫無用處;沒效果
If you do something to no avail or to little avail, what you do fails to achieve what you want.
例句
His efforts were to no avail...他徒勞無功。I apologized repeatedly, but to little avail.我一再道歉，但絲毫沒有奏效。
VERB
接受（提議）；利用（機會）
If you avail yourself of an offer or an opportunity, you accept the offer or make use of the opportunity.
例句
Guests should feel at liberty to avail themselves of your facilities.賓客們應該可以隨意使用你們的各種設施。
英漢詞典釋義
n.
效用, 利益
We tried to keep him alive but to no avail.我們全力搶救他, 但卻徒勞無功。
vt. & vi.
有用于, 有益于, 有助于
All his efforts did not avail.他做的所有的這些努力都是沒有用的。
英英詞典釋義
Noun
1. a means of serving;
"of no avail""there's no help for it"
Verb
1. use to one's advantage;
"He availed himself of the available resources"
2. be of use to, be useful to;
"It will avail them to dispose of their booty"
3. take or use;
"She helped herself to some of the office supplies"