unserviceable
adj. 无用的；不实用的；无益的
近义词：worthless，out，unusable，serviceable，
英英释义
Adjective
- not ready for service;
"unserviceable equipment may be replaced"
- not capable of being used
例句
- The surveillance radar is unserviceable. 监视雷达不工作。
- To damage threads to an unserviceable condition. 螺纹损坏后不可用。
- Unserviceable due to excessive wear. 由于过度磨损而不可用。
- SSR inoperative (unserviceable).( SSR is out of service. 二次监视雷达不工作。
- The following essential approach aid is unserviceable with R/W 31 localizer. 必要的进场设备：31号跑道航道不工作。
- This applies to the transport of both serviceable and unserviceable units. 可用件和不可用件的运输也会遇到相同的问题。