Preet普里特PREabbr.Petroleum Refining Engineer炼油工程师precast segmentaladj.装配式预制的pre-dehydration预脱水pre-charge line预充电流线preheat treatment预备热处理pre-Qin periods先秦时期prelabeled ligand预先标记的配体prearranged point预置点pre-aggregation预聚集Pre-twist angle预扭角度pre-irradiation预照射