Pretl普雷特尔PREabbr.Petroleum Refining Engineer炼油工程师preformativeadj.使 ... 预先形成的n.前缀pregnanedilon.孕二醇premeditatedadj.有预谋的动词premeditate的过去式和过去分词形式.prekalikrein前激肽释放酶, 激肽释放酶原predecrement算前减量prewash tank预洗槽pre - task任务实施前preterm milk早产乳preemergenceadj.(植物种子)出土前的；出土前施用的pretzel bend仰卧举腿屈踝