Pre-op
abbr. preoperation 空转, 试运转; preoperational 试运转的
🧩 词语组成解析
abbr. 炼油工程师（Petroleum Refining Engineer）
观测所\\n[计] 操作, 运算, 算符
🗣️ 情景例句
You really must have your wits about your when dealing with such people.
跟这类人打交道，你必须格外警觉。
Lights glisten.
电灯亮了起来。
How can you change your mind at last minute?
你怎么能在最后时刻改变主意呢？