set-back
n thing that hinders the progress of sth妨碍发展的事物
Hopes of an early end to the strike received/suffered a severe set-back yesterday. 希望罢工早些结束, 这一愿望昨日严重受挫.
Defeat in the by-election is a major set-back to the ruling party. 执政党在补缺选举中落选, 是一极大挫折. ,set `book (also ,set `text) book on which students must answer questions in an examination 必修课本
What are your set books for English A Level? 你们参加高级程度英语考试要读哪些必修课本?