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
You're right. We've earned it.
你说得对，我们有这样做的权利。
You'll hurt your thumb, if you don't take care.
你不专心的话，就会伤到你的拇指。
What was wrong?
怎么啦？