oros光学只读存储器orconj.或者；还是；否则prep.<古>在...之前orlop stringer angle bar最下船侧纵通角钢orificium internum uteri子宫颈内口,子宫颈管内口Or maybe you scared?s形曲线,反曲线Or changing mode in a.中更改模式。Or am I the oddball?反弧形溢流堰Oranienburg grained soap奥堡皂Orostachys cartilagineusn.狼爪瓦松orofaciodigital syndrome口面指综合征Oryza rufipogen Griff.普通野生稻ornithine cycle ureacyle鸟氨酸循环