It was her first official engagement.

　　那是她第一次正式約會。

　　An official pushed through the throng.

　　一位官員從人群中擠過。

　　This was her first official engagement.

　　這是她的首樁公務。

　　The company's official retiring age is 65.

　　公司正式的退休年齡為65歲。

　　The country's official language is Spanish.

　　這個國家的官方語言為西班牙語。