Operational maintenance
[计] 运行维护
🧩 词语组成解析
🗣️ 情景例句
He got the part simply'cos of his loud voice.
他获得了一次演出的机会仅仅是因为他的声音洪亮。
Opportunity only knocks once.
机不可失，时不再来。
Mentally, at least, most of us could compile formidable lists of 'dos' and 'don'ts'.
至少在大多数人的心里会编排出一份“应做什么”和“不应做什么”的令人生畏的单子。