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
Being a mother is not easy,
当一个母亲真不容易，
He has been working in advertising for ten years, but now he is teaching.
他曾经在广告公司服务十年，但现在在当老师。
Excuse me, please. Where's the nearest men's room?
劳驾，离这儿最近的男厕所在哪儿？