Prexa普雷克萨牌手表PREabbr.Petroleum Refining Engineer炼油工程师precast box girder预制箱梁preceding dressing播种前施肥preheating of fuel燃料的预热pre - distortion预失真Pre-Chin Dynasty先秦pre-prodynorphin前强啡肽原precoma diabeticum[医] 糖尿病性前躯昏迷prebreakdown event击穿前现象preterminal string前终端语符列preovulatory stage排卵前期