O字开头的单词或词组
on the lineobservationOEDorbitobedientovertakeon the weekendon boardout of workon Mondayoptimaloutdooroffshoreobliqueopen-endedopen one's mind toon one's own termsoxenoppressout of the wayout of placeounceortopacityoinkoozeorganizeroverdriveoffensiveoffenseout of breathorganisationoutplayopeningoccurrenceopen the door tooxytocinourselvesout of timeon businesson balanceOscar
