PRM=Personal Radiation Monitor 人体辐射检测器PRabbr.(=public relation) 公共关系pragamatic ability语用能力pruning techniques修剪技术prandtl meyer flow普朗特 迈耶流praendopodal plate前内足板Praomys verreauxiin.海岬柔毛鼠practising ability实践能力pranolium chloride普拉氯铵Prasertsiriphandsa巴硕西里攀萨prsistent fraction持续性因子Prunus psedoerasus樱桃