动词
中文翻译：回火
同义词：
['backlash', 'counter-effect', 'reciprocal effect']
例句：
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1. The car's engine backfired as it was cold.
当车冷的时候，发动机发出了回火声。
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2. The new policy backfired when everyone expected a decrease in prices.
新政策实施后，大家都以为价格会下降，结果却适得其反。
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3.The sudden backfire of the gun shocked everyone.
枪突然响起，所有人都被吓了一跳。