v 1 [I] ignite or explode too early, esp in an internal combustion engine 过早点火或爆燃（尤指内燃机）; 回火; 逆火: The car/engine backfired noisily. 那汽车[发动机]发生逆火引起爆鸣. 2 [I, Ipr] ~ (on sb) (fig 比喻) produce an unexpected and unwanted result esp for the people responsible for the action 产生出乎意料及事与愿违的结果（尤指对于该行为的责任者而言）: The plot backfired (on the terrorist) when the bomb exploded too soon. 由于炸弹过早爆炸, （恐怖分子的）阴谋未能得逞. Cf 参看 misfire. n early explosion, esp in an internal combustion engine 过早爆燃（尤指内燃机）; 回火; 逆火.