O字開(kāi)頭的單詞或詞組
on one's way homeout of controlobjectionOdinoppressiveosteo-opiumof lateoverjoyof the timeottoon toporiginal characteropen one's eyes tooverstressoutside ofoxideoverworkon endopen-airospreyonce a weekone-upobviateon the moveoxy-optimizingoverdueout of habiton one's toesOregonocto-opalobscurityOceanusoxidativeoverdraftoutboundobedienceoppressionoil pump purifierown to
