Ｏoath/ EuW/n.誓言,誓约,宣誓obedient/ E5bi:djEnt/n.服从的,顺从的obligation/ Rbli5geiFEn/n.义务,职责,责任obscene/ Rb5si:n/a. 淫秽的,猥亵的obscure/ Eb5skjuE/a.阴暗的;蒙昧的odor/ 5EudE/n. 气味,名声,味offence/ E5fens/n.犯罪,犯规;冒犯offensive/ E5fensiv/a.冒犯的;进攻的offset/ 5R:fset/n.分支,抵销 vt.抵销offspring/ 5R（:）fspriN/n.儿女,子孙,后代opaque/ Eu5peik/a.不透明的;不传导的oppress/ E5pres/vt.压迫,压制;压抑optimism/ 5Rptimizm/n.乐观,乐观主义optimum/ 5RptimiEm/n.最适条件,最适度option/ 5RpFEn/n.选择,取舍orient/ 5R:riEnt/n.东方;亚洲,远东oriental/ Rri5entl/a.东方的;东方国家的orientation/ R:rien5teiFEn/n.向东;定位;方向originate/ E5ridVineit/vi.发源 vt.首创ornament/ 5R:nEmEnt,/n.装饰物 vt.装修orthodox/ /a. 正统的,传统的,惯常的outbreak/ 5autbreik/n.（战争、愤怒等）爆发oval/ 5EuvEl/a.卵形的 n.卵形overflow/ EuvE5flEu/vt.从…中溢出overhear/ EuvE5hiE/vt.偶然听到;偷听overlap/ EuvE5lAp/vt.与…交搭 vi.重迭overt/ 5EuvE:t/a. 明显的,公然的overthrow/ vt.推翻 n.推翻,瓦解overwhelm/ /vt.压倒,使不知所措oxide/ 5Rksaid/n.氧化物