自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
ADJ 官方的；正式的 Official means approved by the government or by someone in authority.
According to the official figures, over one thousand people died during the revolution...
An official announcement is expected in the next few days...
ADJ 公务的；公职的；公事的 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.
ADJ 官员（因职务使用）的 Official things are used by a person in authority as part of their job.
...the official residence of the Head of State.
ADJ （解释、理由等）冠冕堂皇的，桌面上的 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.
The official explanation for the cancellation of the party conference is that there are no premises available...
The official reason given for the President's absence was sickness.
N-COUNT 官员；行政人员；高级职员 An official is a person who holds a position of authority in an organization.
A senior UN official hopes to visit Baghdad this month.
N-COUNT （体育比赛中的）裁判员，执法人 An official at a sports event is a referee, umpire, or other person who checks that the players follow the rules.