The engine keeps backfiring all the time.发动机老是回火.The EPA's rules about what constitutes hazardous waste are backfiring against the nationwide recycling effort.环保署关于有害物质的法规同全国资源回收的工作正好唱反调.A sudden report rang out -- ...

backfiring的音标：...

v.（内燃机等）发生逆火( backfire的现在分词 )，发生回火，（枪炮）向后爆发，发生意外...