英语短语 "bounce back" 是一个常用的动词短语，核心含义是“反弹；恢复；东山再起”，通常指从挫折、失败、疾病、低谷等不利状态中快速或有力地恢复过来。
字面意思是“弹回、反弹”（如球碰到地面弹起来），引申为“从困境中恢复原状/活力”，强调“韧性”和“回升”。
"bounce back" 是不及物动词短语（后面不直接接宾语，但可接介词短语补充说明“从哪里恢复”），主语可以是人、事物（如经济、企业、情绪等）。
指生病或受伤后快速康复。
He had a bad flu but bounced back in a week.
他得了重感冒，但一周就恢复了。
The athlete bounced back from a knee injury to win the championship.
这位运动员从膝伤中恢复，赢得了冠军。
指事业、学业或计划受挫后重新振作。
After his business failed, he bounced back by starting a new company.
生意失败后，他创办了新公司，东山再起。
Don’t worry about the exam—you’ll bounce back next time.
别担心这次考试，下次你会恢复状态的。
指经济、股价、销量等从低谷回升。
The stock market bounced back after the recession.
经济衰退后，股市反弹了。
Sales bounced back in the fourth quarter thanks to holiday promotions.
多亏了节日促销，第四季度销量回升。
指从低落、疲惫中恢复活力。
She was sad after the breakup but bounced back quickly with the help of friends.
分手后她很伤心，但在朋友帮助下很快恢复了情绪。
I was exhausted from work, but a good night’s sleep helped me bounce back.
工作让我筋疲力尽，但睡了一晚好觉后我恢复了精力。
bounce back from + 困境：从……中恢复
e.g. bounce back from a loss（从损失中恢复）/ bounce back from rejection（从拒绝中振作）
bounce back stronger：更强势地恢复（强调“比之前更好”）
e.g. The team bounced back stronger after their defeat.
球队在失利后更强势地回归了。
bounce back quickly/easily：快速/轻松恢复
e.g. Kids usually bounce back from colds faster than adults.
孩子感冒恢复通常比成人快。
"bounce back" 是一个强调“韧性”的短语，核心是“从不好的状态回到好的状态”，适用于健康、事业、经济、情绪等多个场景，是口语和写作中常用的表达。
例句回顾：The economy is finally starting to bounce back after years of stagnation.（经济终于在多年停滞後开始反弹。）
She’s a tough person—she’ll bounce back from this setback.（她很坚强，会从这次挫折中恢复的。）