She has just celebrated 25 years' service with the company.

　　她剛慶祝了自己在公司任職25周年。

　　My parents are celebrating 30 years of marriage.

　　我的父母親即將慶祝結婚30周年。

　　The college celebrated its silver jubilee last year.

　　這所學院去年舉行了建院25周年慶祝活動。

　　They celebrated their silver wedding in May.

　　他們于五月份慶祝了銀婚紀念日。

　　We went out to a restaurant to celebrate.

　　我們到一家飯店里慶祝了一番。