official hour

例句：

1. 1. The official website of the company provides detailed information about its products.
   该公司的官方网站提供了关于其产品的详细信息。
2. 2. He is an official member of the committee.
   他是委员会的正式成员。
3. 3.The official announcement was made at the press conference.
   在新闻发布会上正式宣布了这一消息。