OPPS门诊预付制OPPabbr.对面的；相反的（=opposite）opportunistic rapist机会型强奸犯oppositifolious corn玉米对生种子opportunist pathogen机会致病菌opportunistic access伺机频谱接入opportunistic feeder机会主义取食者Oppenheim's epilepsyopprobrious language粗野的语言; 骂人的话opprobrious behavior可耻的行为opportunistic burglar机会型夜盗犯opportunistic routing机会路由