previa[医] 前置的(如胎盘)
PREabbr.Petroleum Refining Engineer炼油工程师
prednisolone sodium phosphate氢化泼尼松磷酸钠
pre-calcined sintering aids助剂预合成
Pre-Planned Nuclear Support预定核支援
prevocational evaluation shop就业前(职业能力)评定工场
preoptic area of hypothalamus下丘脑视前区
Preconcentration-seperation分离富集
precession in right ascension[天]赤经岁差