公文

例句：

1. 1. The official document was signedby the president.
   这份官方文件是由总统签署的。
2. 2. He received a formal invitation toattend the meeting.
   他收到了参加会议的正式邀请。
3. 3. The government released a new policystatement in response to the public'sconcerns.
   政府发布了一项新的政策声明，以回应公众的关切。