vi.复发，退回原状，(好转后)再倒退
n.旧病复发

原形：relapse第三人称单数：relapses复数：relapses过去式：relapsed过去分词：relapsed现在分词：relapsing

After months of sobriety, John's relapse into drug use was a devastating blow to his recovery.
经过几个月的戒毒后，约翰再次吸毒对他的康复是个沉重打击。
She had managed to stay cancer-free for years, but unfortunately, she experienced a relapse and needed another round of chemotherapy.
她多年来一直保持没有癌症，但不幸的是，她出现了复发，需要再一轮化疗。
The athlete's relapse from a world-record time to a mediocre performance shocked the sports community.
这位运动员从世界纪录的成绩下滑到一般水平，令体育界震惊。
Many alcoholics fear a relapse when they attend social gatherings, as peer pressure can be too tempting.
许多酗酒者在参加社交活动时担心会复吸，因为同伴压力往往难以抵挡。
Her mental health improved after therapy, but a stressful event triggered a relapse of her anxiety disorder.
治疗后她的精神状况有所改善，但一个压力事件引发了她焦虑症的复发。
The company's initial success was followed by a relapse in sales due to poor marketing decisions.
公司在初期取得成功后，由于糟糕的营销决策导致销售额下滑。
After a long-term remission, the patient's chronic illness unfortunately relapsed, requiring urgent medical attention.
长期缓解后，患者的慢性病不幸复发，急需医疗救治。
The football team feared a relapse into their previous losing streak after a few consecutive wins.
足球队在连续获胜后担心会再次陷入之前的连败。
She was determined not to let her past mistakes lead to a relapse in her study habits.
她决心不让过去的错误导致学习习惯的再次下滑。
Her addiction to video games seemed to have relapsed, as she found herself playing for hours on end once again.
她似乎又沉迷于电子游戏，一玩就是几个小时。