Unavailability
[计] 无效性, 不可用性
🗣️ 情景例句
Hey, I wanted you to hear my new sound system
嘿，我正想让你听听我的新音响。
A near friend is better than a fardwelling kinsman.
近友胜远亲。
After a short while he started directing films himself.
不久，他开始自己导演电影。