O字开头的单词或词组
orderedoverviewofficeobstinateon handOrionor sooutrageousout of orderovercastopen-endedonionoccurrenceorganon dutyoutletone-shotoctaveoilon showoffensiveobedientor elseoraofton footoinkoverturnout of breathounceoppressofferingoffshoreoverdriveornamentoverseeon top ofopusobservantovertimeon the weekendoutlook



















