Preani普雷亚尼PREabbr.Petroleum Refining Engineer炼油工程师pre-reconnaissance party先头侦察组preconditioning adaptation前条件作用的适应pregermination in sand bed沙床催芽prefabricating of box beam箱梁预制pre-equilibration column前置平衡柱pre-marital medical exam婚前体检pretreatment filming agent[化] 预膜剂prematurity onset diabetes青少年性糖尿病pre-earthquake dilatancy震前扩容pre - contract liability先合同义务