O字开头的单词或词组
organouteropen-endedovercastovertakeoutrageousourselvesor elseoctaveon showofficeoffensiveoftoutletoxenoffshoreoccurrenceobedientOrionoraon the weekendoinkone-shoton dutyoverdriveoppresson footon the lineoiloilyout of placeonionoutplayonloadoliveobservantounceobverseoverseeofferingobliqueout of order
