firepot火罐,坩埚,火盂firen.火；失火；炉火；开火；热情v.开火；解雇；点燃；急速地连续说fire service implement消防器材Firepower distribution火力分配Fire Emergency Command消防应急指挥fire equipment cabinet消防装备箱fire control accidents消防责任事故罪fire-proof spool box防火片盒firefighting amphibian消防水陆飞机fire resisting casting耐热铸件fire tear-gas shells施放催泪弹fire-forbidden areas禁止射击区

1. If the engine backfires, the sudden pressure in the intake manifold forces the valve back.
   如果发动机回火，进气歧管骤增的压力就迫使阀门向后移动。