形容词
中文翻译：不可用的
同义词：
['unreachable', 'inaccessible', 'unavailable']
例句：
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1. The meeting room is not available for booking until 3 pm.
会议室直到下午3点才开放预订。
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2. The library has limited copies of the book and they are all unavailable at this time.
图书馆这本书的数量有限，目前都不可借阅。
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3. Due to the pandemic, many events have been cancelled, making them unavailable for public attendance.
由于疫情，许多活动已被取消，公众无法参加。