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
Susan is one of the best women you'll ever find.
Susan是你能找到最好的女人之一。
I'm afraid it won't be cold enough for a snowfall.
我恐怕天不会冷的下雪。
The policemen could not cope with the crowds.
警察无法对付群众。