O字母开头的单词或词组(第4页)：

• overdraw
• overproduction
• overvalued
• objurgate
• opalescent
• ostentatious
• ornithologist
• open an account
• openly
• on diet
• overland
• overleaf
• Only joking
• out there
• Olympic Games
• on land
• oak tree
• Oh dear
• orbital
• overpopulation
• oily
• Oolong tea
• ordering
• on a scale
• on a diet
• on cue
• on and on
• on demand
• on file
• on edge
• on line
• on loan
• observer
• on no account
• of no account
• of a kind
• odds and ends
• of late
• of necessity
• of note
• of sorts
• off balance
• off duty
• off the air