back fire
柯林斯词典
1. V-I If a plan or project backfires, it has the opposite result to the one that was intended. 事与愿违
The president's tactics could backfire. 总统的策略可能会事与愿违。
2. V-I When a motor vehicle or its engine backfires, it produces an explosion in the exhaust pipe. (机动车或引擎) 回火
The car backfired. 这辆车回火了。
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