fifty的意思是五十。
例句：
1、Put a fifty pence in the machine.
把一枚五十便士硬币投进机器。
2、There were over fifty applicants for the job.
有五十多人申请这个工作。
3、They served a wonderful meal to more than fifty delegates.
他们招待五十多位代表吃了一餐美味佳肴。
4、We have invited fifty people altogether.
我们共邀请了五十人。
5、And then there's the little matter of the fifty pounds you owe me.
还有件小事儿，你欠我五十英镑呢。
