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
We had a good day.
我们今天玩得很开心。
As they are in such a damaged condition, we doubt we will be able to take delivery.
由于它们残损如此严重，恐怕我们无法提货。
Both the police and the workmen were grateful to the student for this piece of advance information.
警察与工人都对那个学生事先通报情况表示感谢。