他在第五十层楼上工作。

He works on the fiftieth floor.

她在第五十分钟时进了一个球。

She scored a goal in the fiftieth minute.

这是我第五十次尝试做这个蛋糕。

This is my fiftieth attempt at making this cake.

他们庆祝了结婚第五十周年。

They celebrated their fiftieth wedding anniversary.

这本书的第五十章非常有趣。

The fiftieth chapter of the book is very interesting.

他在马拉松比赛中获得了第五十名。

He finished in fiftieth place in the marathon.

今天是他第五十次参加马拉松比赛。

Today is his fiftieth time participating in a marathon.

这是我第五十次告诉你打扫房间了。

This is the fiftieth time I've told you to clean your room.

她举办了一场盛大的派对来庆祝她的第五十个生日。

She celebrated her fiftieth birthday with a big party.

公司正在计划一个特别的活动来庆祝其第五十周年。

The company is planning a special event for its fiftieth anniversary.