PACXn.专用自动计算机交换机PACabbr.太平洋的(=Pacific)abbr.无人驾驶飞机(=Pilotless Aircraft)abbr.政治行动委员会(=political action committee)pachydermic cachexia[医] 粘液性水肿Pacini rs corpuscles帕西尼氏小体Pacaya Samiria ?Pachnephorus lewisiin.谷子鳞斑肖叶甲Pachytriton brevipesn.黑斑肥螈Paclobutrazol damage多效唑药害Pachyapppa tortuosaen.龙爪柳粗毛绵蚜Pachypleurum alpinumn.高山厚棱芹Pachnephorus porosusn.玉米鳞斑肖叶甲pachismus thickening肥厚