Pca
abbr. 污染控制局（Pollution Control Agency）；极地冷空气堆吸收, 极冠吸收（Polar Cap Absorption）；波特兰水泥协会（Portland Cement Association）
🗣️ 情景例句
That's it.
就这样。
They are never alone accompanied by noble thoughts.
思想高尚者决不会孤单。
I didn't know she could swim. Who taught her?
我不知道她会游泳。谁教她的？