Prego普雷戈PREabbr.Petroleum Refining Engineer炼油工程师preclearingn.预清除premouldingn.预先铸模predivision前分裂preliterateadj.无文字记录的；文字以前的n.无文字记录时期的人pre-upset预镦粗preoral pit口前窝preheat fan预热风扇pre-swirl预旋prearranged预有安排preglaucoma青光眼前