abbr.检查局(Office of Censorship);指挥官(Officer Commanding);加拿大官佐勋章(Officer of the Order of Canada);偏离中心(off centre 或 off center);候补军官生(officer candidate);旧天主教徒(Old Catholic);在中心(on centre 或 on center);(海)航向正确(on course);场外交易的(over-the-counter);口服避孕药(oral contraceptive);(集邮用语)原信封(original cover);录用意向电话(offer call)