PROSI=Procedure Sign 电台业务通信符号pron.能手；行家；正面adj.专业的；赞成的adv.正面地prep.赞成protuberantia palatina腭隆凸proline-rich protein富含脯氨酸蛋白质protoplast preparation原生质体制备prokarvotic expression原核表达pro-business culture重商文化prothorax lateral seta臀足趾钩prototrophic bacterium原养菌prostaglandin analogue前列腺素类似物Protheses and implants假体和植人物proeutectoid cementite先共析渗碳体,游离渗碳体