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
I know they are.
我知道他们会。
Affairs that are done by due degrees are soon ended.
事情要安步就班地做，就会很快地做完。
How old are you?
你多大啦？