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
It's hard to say. I like volleyball a lot, but I guess I like tennis better.
很难说，我喜欢排球，但我想我比较喜欢网球。
Necessity (or Need) has (or knows) no law.
需要面前无法律。
One would expect them to know their parts by heart and never have cause to falter.
人们以为，这些演员一定会把台词背得烂熟，绝不会临场结巴的，