backset

新政策被广泛视为经济改革的一次倒退。

The new policy was widely seen as a ___backset in economic reform.

经过两个月的稳定，他的病情出现了令人担忧的倒退。

After two months of stability, his condition took a worrying ___backset.

谈判中的这一意外挫折对和平进程而言是一次严重倒退。

This unexpected failure in talks was a serious ___backset to the peace process.