O字开头的单词或词组
off-whiteofficiallyon the surfaceoutreachonce and for allone and onlyOrpheusoutliveomissionon condition thatobstruentOlympic Gamesoff the shelfopen one's eyes toopticoligo-outdateone wayoverplayordinateon crediton calloutsetobtuseorder numberover driveobnoxiouson fireoverheadotherwiseoutskirtsoutdoon one's toesonusoperableoil pump purifierOPoutrightoverhangoustoutskirtobstruction
