OPPS门诊预付制OPPabbr.对面的；相反的（=opposite）oppositive reaction对峙反应opposing corruption反腐败Oppenauer oxidation奥本瑙尔氧化反应,欧芬脑尔氧化作用opportunistic fungus机会真菌Oppenheim rs disease先天性肌弛缓Oppennauer oxidation欧芬脑尔氧化oppositifolious seed对生种子Opportunism behavior机会主义行为Oppenheim's syndromeopportunistic infect机会感染