Ppa
abbr. 苯丙醇胺（phenyl-propanolamine）；并行处理自动机（Parallel Processing Automata）；实验性反应堆（Preliminary Pile Assembly）
🗣️ 情景例句
Don't you think you ought to call Pete
你不觉得应该打个电话给Pete
He is truly happy who makes others happy.
真正幸福的是使人幸福的人。
This is the school building.
这是学校大楼。