O字开头的单词或词组
Oceanusombudsmanout-of-pocketovaown toone-upobjectionableoff-keyoffer priceout of the worldOdinoverlyoutdatedovertakenopaloverworkoutboundocto-ogiveof the timeoverhearowlomnipotentobligingon the matorientedospreyoverdraftobscurityoctaneoverpowerohoscillateopticson the telephoneoxidativeon saleoverallsoverageon the increaseobedienceocelot
