official

a.官方的；官员的 n.官员，高级职员

offence (US offense), offend, offender, offense, offensive, offensively, offensiveness, offer, offer sth., offer to do sth., offering, offertory, offhand, offhanded, office, office boy (fem 阴性作 `office girl), office holder (also `office bearer), office hours, office-block, officer, officialdom, officialese, officially, officiate, officious, officiously, officiousness, offing, offish, offline, offprint, offset, offshoot, offshore, offside, offspring, oft, oft-times, often, ogle,