Official means approved by the government or by someone in authority.
authorized
According to the official figures, over one thousand people died during the revolution.
根据官方数字,有一千多人在革命中遇难。
An official announcement is expected in the next few days.
预计在几天后将会发表一份官方声明。
Official activities are carried out by a person in authority as part of their job.
The president is in Brazil for an official two-day visit.
总统正在巴西进行为期两天的正式访问。
Official things are used by a person in authority as part of their job.
the official residence of the head of state.
国家元首的官邸。
If you describe someone's explanation or reason for something as the official explanation, you are suggesting that it is probably not true, but is used because the real explanation is embarrassing.
They realized that the official explanation left facts unexplained.
他们意识到官方的解释并没有对事实做出解释。
officials
An official is a person who holds a position of authority in an organization.
A senior UN official hopes to visit Baghdad this month.
一位联合国高级官员希望本月访问巴格达。
Local officials say the shortage of water restricts the kind of businesses they can attract.
地方官员说,缺水限制了他们能够吸引的商业类型。
An official at a sports event is a referee, umpire, or other person who checks that the players follow the rules.
Officials suspended the game because of safety concerns.
出于安全考虑,裁判暂停了比赛。