P E体育教育Pn.字母Ppyelonephritis calculosa结石性肾盂肾炎pyridine carboxylic acid吡啶羟酸pyridine disulfonic acid[化] 吡啶二磺酸pyridone-carboxylamiden.吡啶酮甲酰胺p-methoxyacetophe none[化] 对甲氧基苯乙酮P-chlorophenoxy acetic对氯苯氧乙酸P. E and Health Coursep-isopropyl o-cresol对异丙基邻甲酚; 香荆芥酚P.E. in Universities学校体育pyrazole carboxylic acid吡唑酸