vi.适得其反，回火，逆火，产生事与愿违的不良(或危险)后果
n.回火，(故意引燃以阻止野火蔓延的)迎火，(摩托车的)放气声

原形：backfire第三人称单数：backfires过去式：backfired过去分词：backfired现在分词：backfiring

The politician's attempt to discredit his opponent backfired when evidence proved the opposite.
这位政治家试图诋毁对手的企图适得其反，因为证据证明了相反的事实。
Their marketing campaign backfired when customers complained about the ads being offensive.
他们的营销活动适得其反，因为顾客投诉广告内容令人反感。
She thought asking for a raise would be a good idea, but it actually backfired and she lost her job.
她本以为要求加薪是个好主意，结果却适得其反，反而丢了工作。
His decision to skip practice backfired when he performed poorly in the game.
他决定不参加训练的结果是反效果，他在比赛中表现糟糕。
The company's attempt to cut costs by reducing staff ended up backfiring due to increased workload on remaining employees.
公司试图通过裁员来削减成本，但结果却因剩余员工的工作量增加而适得其反。
The protest against the new law backfired when it led to stricter enforcement of existing regulations.
反对新法律的抗议适得其反，因为它导致了现有法规的更严格执行。
He thought skipping homework would give him more free time, but it backfired when his grades suffered.
他认为不做作业可以给自己更多空闲时间，但结果是成绩下滑，反受其害。
Her plan to surprise her friend for her birthday backfired when she showed up unannounced and caught her friend in an awkward situation.
她打算给朋友一个生日惊喜，结果不请自来，却撞见朋友处于尴尬的境地，计划适得其反。
The athlete's decision to change his training routine just before the competition backfired, causing him to underperform.
运动员在比赛前改变训练计划，结果反受其害，导致比赛表现不佳。
The company's decision to lower prices to boost sales backfired when it negatively impacted their profit margins.
公司降低价格以刺激销售的策略适得其反，因为这影响了他们的利润空间。