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
let me give you some additional thoughts and ideas I have.
让我提出一些另外的想法。
In Arizona, the stars seem very bright.
在亚利桑那州，星星看起来格外明亮。
It was very dark, so they turned on a torch.
饭厅很暗，于是他们打开了手电筒。