Unavailability
[计] 无效性, 不可用性
🗣️ 情景例句
that will bring parents and teachers together once a week
让家长们及教师每星期一次
Cheerfulness and goodwill make labour light.
欢快与好意，劳动不觉累。
Jeremy Hampden has a large circle of friends and if very popular at parties.
杰里米。汉普登交际甚广，是各种聚会上深受大家欢迎的人。