O字開頭的單詞或詞組
on the alertoverblownoutmodedoperation manageroversawopening balanceoutpouringone-stepoastopinionatedoscoratoryon trialonrushobstetricos1oomphobsequiousouter spaceoathsoverarchOTDordinarilyoppositelyobstructingoutpostomnivorousobscenityoil painton the jobocta-outlanderon recordovercrowdon the fenceout of useout of tuneon grounds ofoncomingox.once too oftenovertime work
