Unavailability
[计] 无效性, 不可用性
🗣️ 情景例句
I want to buy a sleeper ticket to New York.
我想买张到纽约的卧铺票。
He lives in a luxurious residence.
他住在一间豪华的寓所里。
He also said that he had found five empty whisky bottles which the ghost must have drunk the night before.
他还说他发现了5只空的威士忌瓶子，肯定是鬼魂昨天晚上喝的。