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
I estimate his age to be about 30.
我估计他的年龄大约30岁。
What track does the Metroliner leave from?
华纽特快从第几轨道开出？
They're sales reps.They're very lazy.
他们是推销员，他们非常懒。