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
Dinner for the entire family.
给全家做晚餐
Enough!
够了！
She must be at least thirty-five years old.
她至少也有35岁了。