单词检索
- observe
- observer
- obsess
- obsessed
- obsession
- obsessive
- obsessive-compulsive
- obsidian
- obsolesce
- obsolescence
- obsolescent
- obsolete
- obstacle
- obstetric
- obstetrician
- obstetrics
- obstinacy
- obstinate
- obstipation
- obstreperous
- obstruct
- obstruction
- obstructionist
- obstruent
- obtain
- obtect
- obtest
- obtrude
- obtrusion
- obtrusive
- obtund
- obturate
- obtuse
- obumbrant
- obumbrate
- obv
- obverse
- obversion
- obvert
- obviate
- obvious
- obvolute
- oca
- ocarina
- occasion
- occasional
- occasionalism
- occasionally
- occidental
- occipital
- occiput
- occlude
- occlusion
- occlusive
- occult
- occultation
- occultism
- occupancy
- occupant
- occupation