adj.不可用的，无法得到，难以获得，不能(或不愿)见面，不能(或不愿)交谈

The website is currently unavailable due to scheduled maintenance.
网站由于计划内的维护当前无法访问。
Unfortunately, the book you requested is temporarily unavailable at our library.
很遗憾，您所请求的图书在我们图书馆暂时不可用。
The professor had to cancel his lecture as he became unexpectedly unavailable.
由于教授意外地无法出席，他不得不取消了讲座。
Our customer service hotline is unavailable during non-business hours.
我们的客户服务热线在非工作时间无法使用。
The flight you booked has been rescheduled due to the unavailability of the original aircraft.
您预订的航班由于原定飞机不可用已重新安排。
The park's hiking trails are unavailable until further notice due to storm damage.
由于风暴破坏，公园的徒步路径直至另行通知前均不可使用。
The software update is currently unavailable for your device, as it is not compatible with the latest version.
由于您的设备与最新版本不兼容，目前无法为您的设备提供软件更新。
I'm afraid the meeting room is unavailable on Friday afternoon; it's already been booked by another team.
恐怕周五下午会议室不可用，它已被另一团队预订。
The swimming pool will be unavailable for two weeks while it undergoes renovations.
游泳池在进行翻修期间两周内将无法使用。
The ingredient required for the recipe is unavailable in local stores; you may need to order it online.
配方所需的原料在本地商店中不可用，您可能需要在线订购。