Pre-op
abbr. preoperation 空轉, 試運轉; preoperational 試運轉的
?? 詞語組成解析
abbr. 煉油工程師（Petroleum Refining Engineer）
觀測所\\n[計] 操作, 運算, 算符
??? 情景例句
Good morning, sit down please.
早安，請坐。
Friends are like fiddle-strings,they must not be screwed too tight.
朋友有如琴弦，不能上的太緊。
Excuse me, Miss Yang, she said.
“請原諒，楊小姐，”她說。