自动邮票出售机

automatic stamp-vending machine

• obsess
• obsidian
• obsolescent
• obsolete
• obstacle
• obstetric
• obstinate
• obstreperous
• obstruct
• obstruction
• obstructive
• obtain
• obtrude
• obtuse
• obverse
• obviate
• obvious
• ocarina
• occasion
• occasional
• Occident
• occult
• occupant
• occupation
• occupier