Prelo普雷洛PREabbr.Petroleum Refining Engineer炼油工程师preleptotene stage细线前期Precerebral artery大脑前动脉preceise ephemeris精密星历pre - tax income应税收入precoital stimulus交配前刺激predesign services设计前服务preduced impedance降阻pregressive myopia进行性近视predetermined cost预计成本precancerous state癌前状态