piff(子弹飞过声)唏, 噼PIn.圆周率Piral electrode wire主动螺旋电极pirn winding machine卷纬机Pilocarpus jaborandi毛果芸香Pirogoff rs triangle皮罗果夫氏三角Pilococcus miscanthin.毛粉蚧pilocarpine poisoning毛果芸香碱中毒piriform muscle nerve梨状肌神经Pirogoff's amputationpisto type transducer活塞式换能器Pistach rosette virus阿月浑子树丛簇病毒