Pcas
(pca 的复数) 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
Always remember to wash your hands before eating.
用餐前谨记要洗手。
Every bullet has its billet.
无风不起浪。
It almost looks as if someone has drawn it.
看起来好像这只鹿是画上去似的。”