支持楼上hyl2004的翻译.
也可译为：Your efforts will pay off in time.
in time除了“及时”,还有“迟早,总有一天”的意思.
pay off：回报,还清
我记得,《21世纪英文报（中学生版）》上有一篇文章,最后一句就是Efforts paid off.