Ppx
[计]= Packet Protocol eXtension,包规约扩充
🗣️ 情景例句
The grass. The trees. The fresh air.
草地， 树木， 新鲜空气。
What can I say?
我能说些什么呢?
Manners are quite different from country to country.
各国的礼仪各不相同。