Oppe
abbr. Office of Program Planning and Evaluation 程序设计与评估局; Operational Propulsion Plant Examination 作战推进设备检验（美国海军）
🗣️ 情景例句
Please, after you.
你先请。
He who does not gain loses.
无所得即有所失。
When did they live there?
他们什么时候住在那儿？