O字开头的单词或词组
ombudsmanoxidationoil pump purifieron the matoutcastovertakenoverkillobjectionableon the way toonlookeronshoreoutnumberovereaton the shelfobligingob-occupantoutside loopopenerout of dangerorderingohmicon the telephoneout of the worldon tapoutpaceousteroverallsoryxon the rocksoutput poweroffer priceogiveomnibusorioleone dayon the increaseoff-trackobservanceOsageopineoffice building
