propes腹足, 前足propn.支柱；支持者；倚靠人n.道具n.螺旋桨；推进器v.支撑；维持prophage-mediated conversion原噬菌体中介转变prophylactic antibiotics usage预防性抗菌用药propaedeutic prospecting stage初步勘探阶段propionic/acetic acid ratio丙酸/乙酸prophylactic forceps operation预防性产钳分娩术propanolol withdrawal syndrome心得安撤离综合征Propylene-ethylene copolymer丙烯-乙烯共聚物Propotional Length to Dirmeter长径比prophylactic artificial pacing预防性人工起搏器propagating buds by using buds以芽繁芽