Nonscheduled maintenance
[计] 非预定的维修时间
🧩 词语组成解析
a. 不定期的, 不按计划的
🗣️ 情景例句
Maybe he's angry.
也许他在生气。
What does you want to eat?
你要吃什么？
Has he had anything to eat this morning?
他今早吃了什么东西吗？