n. 效用,利益
v. 有帮助;有益;有用
to/of no avail 没结果,无效果
avail yourself of sth
利用某事物〔指提议、机会等〕
We searched the whole area but all to no avail. Robbie had disappeared. 我们找遍了整个地区但毫无结果,罗比失踪了。
How many schools avail themselves of this opportunity each year?
每年有多少学校利用这种机会?
BrE /əˈveɪl/
NAmE /əˈveɪl/