adj.无用的,不能胜任的,无益的;使不得;
例句:
At any rate, it would be a pity-nay, a sin, a crime [ 6]-to let your [ 7] English get rusty and become finally unserviceable.
不管怎么样,让你的英语生锈,最终变得无法利用,那是件憾事不,是罪过,是犯罪。
Unserviceable equipment may be replaced.
无用的设备会被替换掉.
The surveillance radar is unserviceable.
监视雷达不工作.