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
He couldn't take time off to come to New York with me.
他走不开 没办法和我一起来纽约。
I don't believe it.
我才不信咧！
I'm not sure that this conference is as good as last year's.
我确信这次会议不如去年的会议精彩。