托福单词列表

oak Oakland oasis oat obedience obedient obey objectify objective objectively obligate obligation oblige obliterate oblivious obscure observation observatory observe observer obsess obsession obsidian obsolete obstacle obstruct obstruction obtain obvious obviously occasion occasional occasionally occupancy occupant occupation occupational occupy occurrence Oceania oceanic oceanographer oceanographic oceanography ocher October octopus odd odor off offend offensive offer offering office officeholder official officially offset offshoot offshore offspring oft ogallala Ohio oilskin oily Oklahoma olfactory olive oliver omission omit omnibus omnipotent once oneness onetime ongoing onion onlooker onrushing onset onslaught onstage Ontario onto onward ooze opaque open opening openly opera operate operation operational operator opinion opponent opportunist opportunistic opportunity oppose opposite oppositely opposition optical optimal optimization optimum option optometrist oral orange orbit orbital orchestra orchestral orchid orderly ordinance ordinarily ordinary ordnance ore Oregon organ organic organically organization organizational organize orient orientation origin original originality originally originate originator orleans ornament ornamental ornamentation ornate orogeny orphanage orthopteran oscillate osprey ostracize ostrich otherwise otter ought ounce our ourselves oust outbreak outbuilding outcome outcrop outcry outdoor outermost outfit outflow outgassing outgoing outlet outline outlook outlying outnumber outpouring output outrigger outright outside outsider outskirt outstanding outward outwash outweigh outwit outwork oval oven overall overbalance overburden overcast overcharge overcome overconfident overcrowd overcultivation overestimate overexploitation overgeneralize overgraze overgrow overhang overhead overheat overirrigation overkill overland overlap overlie overload overlook overly overnight overprint overproduction override overrun oversea oversee overshadow oversight overt overtake overtax overtime overtone overturn overwhelm overwhelmingly owe ownership ox oxfordshire oxide oxidizable oxygen oyster oystercatcher