Unavailability
[计] 无效性, 不可用性
🗣️ 情景例句
Will your family be attending the graduation ceremony?
你的家人要来参加你的毕业典礼吗？
To advertise cheap food
推销廉价食物
Quite by accident. I moved a few peas and there it was.
很偶然。我挪了几颗青豆就发现了。