Unavailability
[计] 无效性, 不可用性
🗣️ 情景例句
It's the way it should be.
本该如此。
What were you doing at about 4 o'clock yesterday afternoon?
你昨天下午在大约4点钟正在做什么？
No matter how many guests were present, the great house was always immaculate.
不管去多少宾客，大房子里总是收拾得干干净净。