O字开头的单词或词组
obituaryoscillationon the airoil spilloperation manualos1overcameoakumout of boundsordainother oneOsirisoverrateocta-off-peakonce or twiceO2open onOSFon the alertoffenceoral examinationoscoutshineoverdrawoutstretchoff the cuffone-eyedorder formorthonormalover weightoliooperandobjectivityoppositelyopt foron the runoverflewon-timeoil pressoxycodoneoverindulgence
