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o开头的英语单词-英语单词大全

owl organized on the one hand on sunday afternoon out of work objection out of order out of respect officially optional off the record on the table on the alert out of control operational outlook owing obdurate oaf obstinately ombudsman oceanarium obstruct ominous on hand open sb's eyes to outdated outstrip overture on the other side on the battlefield order of magnitude originality obsessed obsolescent octogenarian off-key ogle operetta ordnance oddments orchid orotund ornithologist on a small scale on guard obstetrics organelle offerer oafish Oakland oaks oaths Oatly OB obduracy obdurately obfuscated obiter objectify objector obliterating obliteration oblongata oboe obscurer obscuring obscurities obsecrate obsequies obsequiousness observances observing obstructions obstructive obtruded obtruding obviating occasioned occasions occluded occlusal occulter occupant occupants occupies occurred oceanfront ocellus och ocher ochre Ocimum octagon octant octopuses oddest oddness odontalgia odontic OECD offensiver offeror offices officina offline offscourings offsets offshoring oft ofttimes ogive Ogles ohh Ohio oiling oils oink okey Oklahoma okra OKS OLE olecranon olfactories Ollie ologies Olympiad Olympians Oman ombudsmen omega omens omitting omnipotence onboard onboarding oncorhynchus oncotic onefold oneness ones onomatopoeic onrush onrushing onstage Ontario ontology onym onyx oont OOO ootheca oozed OPEC openings opens operable operculum opern ophiolite ophthalmic opiates opinions OPM Oppenheimer opposes opposing oppugn oppugnation opted optic optimistical optimized opting options opusculum opuses oracles orals Orbison orca ordained orderlies ordinariness ores organelles organically organised organisms organist organizes organotypic orichalc Orientale oriented orifices oriflamme origination Orleans orphaned orphaning orphans orrow orthogon orthopoxvirus oryx oryzae oryzalin Oscar oscillation Oslo osmolality osmose osmotic osphradium ospreys ossia ostensibly ostentatiously osteoblasts osteoplasty ostiary ostiole ostler ostracized otalgia othering otherwhere otic otolaryngology Otro otto ough ouster outages outbreaks outbursts outfits outfitted outgrew outgunned outlined outpace outperform outperformed outputted outraged outro outrush outshines outsiders outsmart outsold outsole outstripping ovarian overactive overanalyzing overbalancing overburdened overcapacity overcooked overcrowding overcurtain overdoing overdrawing overdressed overdrop overestimated overestimating overfishing overfly overheard overhears overlapped overlaps overloaded overloads overlooked overlooking overlord overnice overnights overperform overplay overprotect overreaching overreacted overrides overrode oversew overshadowed overshadowing overshot overspend overstep overstimulating overtaken overtaking overthrew overtook overtures overused overviews overwatered overwrapping owed owes owler oxbow oxen Oxfordshire oxidase oxybiotic oxycarbide oxyde oxygenate oxygenating oxyhydrate oysters oz Ozawa Ozzie Oak Ridge Oak Ridge National Laboratory oath of office obey the order object complement object function object oriented object oriented programming objective function obligatory course obligatory right oblique angle oblique flow oblique incidence obliquity of the ecliptic observation method observe on observed data Observer Pattern observer status obstacle course obtain employment obtain evidence obtuse angle occipital lobe occult blood occupational health occupational therapist occupied area occupied territories occupy in occur as occur for ocean bill of lading ocean dumping oceanic crust odd couple odd number odd one out oddly enough odds ratio odor control OECD country of account of all of all kinds of choice of concern of good repute of great importance of hers of his own of its own accord of noble birth of oneself of record of reputation of service of these of value of weight of yours off and off of off the boil off the cuff off the map off the peg off the reel off the shelf off the wagon offend against offensive team offensive weapons offer for offering price office automation office chair office worker officers and soldiers official duties official receipt official title official transcript offline browser offset press offset printing offshore drilling offshore engineering offshore platform offshore structure oh my oh yes Ohio River Ohio State Ohio State University Ohio University oil and gas oil and grease oil cooler oil depot oil derrick oil emulsion oil exploration oil extraction oil extractor oil filled oil leak oil leakage oil lubricant oil lubrication oil mist oil of vitriol oil paint oil painter oil pipeline oil pool oil production oil purifier oil recovery oil reservoir oil residue oil seal oil separator oil slick oil sources oil spill oil sprayer oil tanker oil vapour oil viscosity oily waste water oily water OK button Oklahoma City old age old chap old enough old faithful old fashioned old fox old gentleman old goat old lady old maid Old Norse Old Testament old woman older brother oleic acid olfactory bulb olfactory nerve olive branch olive green Olive Tree Oliver Cromwell Oliver Stone Olympic Charter Olympic emblem Olympic Game Olympic motto Olympic Movement Olympic rings Olympic Village Olympique Lyon on a dime on a par on a platter on a regular basis on a shoestring on a trip on aggregate on air on all sides on an empty stomach on an equal footing on an even keel on arrival on bail on balance on basis of on berth on both sides on cloud nine on commission on consignment on hire on hold on instinct on its merits on key on Monday on net on offer on parade on parole on patrol on pins and needles on prescription on probation on receipt of on reflection on request on screen on show on sick leave on site on spec on stage on standby on stilts on suspicion on tenterhooks on the analogy of on the bandwagon on the bed on the behalf of on the bench on the bend on the bias on the bottle on the bounce on the bum on the canvas on the carpet on the cheap on the couch on the cross on the decline on the dot on the earth on the edge on the eve of on the fence on the fire on the floor on the front on the grass on the ground on the heels of on the hog on the hook on the inside on the Internet on the island on the journey on the lake on the level on the lips of on the list on the lookout for on the loose on the mat on the moon on the net on the nod on the occasion on the outside on the principle of on the rails on the recommendation of on the rise on the rocks on the ropes on the site on the skids on the slate on the slide on the sly on the street on the stroke on the stump on the subject of on the tap on the tin on the top on the trail on the train on the wagon on the wane on the way on the wing on this occasion on tiptoe on tour on tow on track on trial on trust on your back on your toes onboard computer once every two weeks once in a lifetime one dimension one dimensional one half one hand one in a million one more chance one of one of them one or two one person one plus one one quarter one sided one size fits all Onion rings onion soup online bookstore online casino Online Game only child only for only if only one only then onset time onus of proof onus probandi op amp open caisson open championship Open Forum open issues open minded open pit mine open source open the door open window opening day opening hours opening up openness to experience operate mode operating condition operating leverage operating mechanism operating mode operating system operating theatre operation and maintenance operation steps operational efficiency operational excellence operational flexibility operational research operations manager operations research ophiolite suite opinion about opinion poll opium poppy Opium War opportunistic infection opposite party opposite polarity opposite side opposition party Oprah Winfrey opt for opt out of optic disc optical cable optical communication optical fibre optical illusion optical lens optical microscope optical microscopy optical purity optical scanner optical transmitter optical trapping optical valley optimal allocation optimal control optimal process optimal solution optimization algorithm optimization design optimization model optimization problem optimize allocation of resources optimize capital structure optimize structure optimizing compiler optimum condition option market option pricing model optional equipment optional item optional parameter or anywhere or otherwise or somewhere oracle bone oracle bone inscriptions oral cavity oral communication oral contraceptive oral exam oral health oral interpretation oral medication oral tradition oral ulcer orange blossom orange marmalade orbital angular momentum orbital elements Orchard Road orchestral music Order Confirmation order dishes order of order of importance order of precedence ordered set ordering cost ordinary life ordinary people ordinary portland cement ore body ore concentrate ore deposit ore fines organic binder organic chemist organic chemistry organic compound organic contaminant organic matter organic pollutants organic substance organizational culture organizational effectiveness organizational structure organized crime organized religion organizing ability organophosphorus pesticide Orient Express oriental cherry oriental pearl oriental style original articles original artwork original author original bill of lading original copy original data original design original equipment manufacturer original image original manuscript original meaning original sin originate in Orlando Magic ornamental stone orogenic belt orthodox church Orthodox Eastern Church Orthodox Judaism orthogonal design orthogonal test orthostatic hypotension Oscar Awards oscillating circuit oscillation amplitude oscillation frequency osmotic fragility osmotic potential osmotic regulation other assets other colors other comments other countries other expenses other person other side other things being equal otherwise than Ottoman Empire ought to do sth ought to know better out from out loud out of a hat out of accord with out of charity out of curiosity out of danger out of earshot out of envy out of focus out of my mind out of pique out of pity out of proportion out of shape out of spite out of the race out of the usual out of tune out of whack out on parole outboard engine outbound tourism outbound tourist outbound travel outdo oneself outdoor furniture outdoor lighting Outer Mongolia outer suburbs outer wall outermost layer outgoing message outlet pipe outlet water outline form outlook for output power output value output voltage outright sale outside in outside of outstanding achievement outstanding claims outstanding feature outstanding student outward processing oval window ovarian cyst over against over and under over the fence over the long haul over the telephone over the weekend over with over yonder overall design overall planning overall quality overburden pressure overcast sky overcome difficulties overdue fine overdue payment overflow dam overflow valve overflow weir overhaul period overhead crane overhead projector overhead transmission overhead transmission line overheated economy overland transportation overlap ratio overload capacity overload protector overrun oneself oversea Chinese overseas market overseas student overshoot oneself overshoot the mark overtime pay overtime payment overtime working overturning moment overwhelming superiority Owen Hargreaves own brand Oxford English Oxford English Dictionary Oxford University Press oxidative phosphorylation oxidative stability oxidative stress oxide semiconductor oxidized zone oxidizing reaction oxygen mask oxygen saturation oyster mushroom ozone depletion optimize the economic structure ordinary differential equation ODA offal OLEDs olefin olefins oleo oleoresin oligomer oligomeric oligomerization oligomers olivine OLPC ontological OPD OPIC optically Orchidaceae Ordos orebody ork orthoclase orthodontic orthotopic ory osculatory OSE osmium overemphasized overlaying overlong overtop oviposition Oxazoline oxidants oximation oxygenated oxygenation oxytocin OA Oaxaca oblata octadecyl oculi Odeo ods OFDM OG ogg oilwell Okinawa olefination omentum onlap oocytes oomycetes operability Ophir optical coupler optical encoder optical isolator optical waveguide optically active OQ organosilane organotrophic ortho orthoesters orthopaedic orthopedic OSF osteoarthritis osteotomy outcropping outperforms overburden overglaze overlaying welding overshoot overtopped overtopping

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