Unavailability
[计] 无效性, 不可用性
🗣️ 情景例句
I had never been there before.
我以前从来没有去过那里 。
Would you like to have some dinner?
你想吃饭吗？
She arrived in England a week after the Thermopylae.
它抵达英国时比“塞姆皮雷”号晚了1个星期。