“一波三折”，汉语成语，原指写字的笔法曲折多变，现比喻事情进行中意外的变化很多。可以翻译为“be full of ups and downs，strike one snag after another或be full of twists and turns”等。

例句：

谈判一波三折。

The negotiation were interspersed with problems.

我们的婚姻一波三折。

There have been many ups and downs in our marriage.