O字母开头的单词或词组(第2页)：

• officially
• oarfish
• overfish
• oil rig
• overalls
• originally
• oddly
• ominously
• overbalance
• overpopulated
• over-industrialized
• organically-grown
• offender
• observant
• over-zealously
• ombudsman
• obstinately
• ow
• oblong
• on account to
• off-hand
• offshore
• on good terms with sb.
• oncoming
• ongoing
• onlooker
• orientate oneself
• orientate
• out of line with
• outcast
• outcry
• outdated
• outdo
• outlaw
• outlying
• outright
• overrun
• of the period
• on a daily basis
• on the urban scene
• on the heavy side
• of all time
• on the bottom
• on hard times