O字开头的单词或词组
oppressiveolivineon the edge ofoctaneoddnesson wingson the part ofOrmosiaovationoccupantone and allout withon one's own accountoptimizingOne man's meat is another man's poisonowner's capitalon the houseoverkillOPD.odiousOPECOxbridgeorderingoverstockoringomnibuson...basisoffbeatoddlyoff dutyoversoulon consignmenton the mapoperation managerointmentout of habitone-to-oneon the decreaseooforyxorallyonlay