The fire warning lights just flashed on, engine on fire, now discharging.

火警灯刚才亮了，发动机着火，正在灭火。

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He found that if he kept the truck in fifth gear and didn't go any slower than 25 MPH, he could still move ahead, even with his engine on fire.

他发现如果他使卡车在五分之一挡并且速度不低于25英里每小时的话，即使他的引擎是着火的他仍然可以继续前行。

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Capt. Hunt asked which engine was on fire.

亨特上尉问是哪个引擎着火了。

《柯林斯英汉双解大词典》

"Our innovation engine is on fire, " he told investors.

FORBES: Magazine Article

He and colleague John Farrar practiced fighting a large engine fire on a recent windy day.

WSJ: Airplane Fires: Dallas-Fort Worth International Airport's Firefighter Training

Torquay's second fire engine would also be cut from full time to on call, as would the second fire engine in Taunton.

BBC: Devon and Somerset Fire Service facing ?5m budget cuts