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
And, Carl, you join in at any time.
还有Carl， 你随时都可以加入。
God! It's a hard stuff.
唔！这家伙是个硬骨头。
What's the time?
几点了？