O字开头的单词或词组
OLEobscurityorthopedicsornateoscillateoverstateon holidayon one's toesown toophthalmologyoverhearoxidativeorienteeringorganizationalopen seaovershadowoversightonerousoil pump purifierout-of-pocketoverageorificeoff-keyout of characterointmentoatmealocelotombudsmanomnivoreolefinon the matobjectionableon the way tooctaneoutbackoverflewonshoreovertakenolfactoryoutcryoutcaston the house
