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
He spends too much money on his hobbies.
他在爱好方面花了很多钱。
A man without money is a bow without an arrow.
人无钱，犹如弓无箭。
It was still early when I returned home.
我回到家时，时间还早。