Ppx
[计]= Packet Protocol eXtension,包规约扩充
🗣️ 情景例句
What's the matter?
发生了什么事？
Sorry, I guess I wasn't thinking. I won't do it again.
对不起。我对这事没想过，下次不这样了。
The system has worked so well, that it has been adopted in other countries too.
由于这种制度行之有效，已被其他国家采纳。