An afterburner is a piece of equipment on some jet engines, mostly on fast military planes. It sends extra fuel into the hot gas that is already leaving the engine and burns it there. That gives the plane a sudden extra push of power.

An afterburner is a piece of equipment on some jet engines afterburner（後燃器）是裝在某些噴射引擎上的設備，mostly on fast military planes大多裝在快速軍機上。It sends extra fuel它把額外的燃料 into the hot gas that is already leaving the engine送進已經要離開引擎的高溫氣體裡，and burns it there並在那裡把它燒掉。That gives the plane a sudden extra push of power這讓飛機瞬間多出一股推力

It also uses a huge amount of fuel, makes a very loud noise, and often shows a flame at the back. Pilots turn it on to take off in a short space, to climb fast, or to fly very fast.

It also uses a huge amount of fuel它也很耗油，makes a very loud noise聲音非常大，and often shows a flame at the back而且後面常常會看到火焰。Pilots turn it on飛行員會打開它 to take off in a short space好在短距離內起飛，to climb fast快速爬升，or to fly very fast或飛得非常快

Ordinary passenger planes almost never have one.

Ordinary passenger planes一般客機 almost never have one幾乎都沒有這個裝置

Though actually, the name sounds like “a burner you add later”, but it is a special part of a jet, not something you bolt onto a car. A car turbo is a different machine: it uses exhaust to spin a fan.

Though actually不過實際上，the name sounds like “a burner you add later”這個名字聽起來像「後來加裝的燃燒器」，but it is a special part of a jet但它其實是噴射引擎的一個特殊零件，not something you bolt onto a car不是能栓在車上的東西。A car turbo is a different machine汽車的渦輪增壓是完全不同的機構：it uses exhaust to spin a fan它是靠廢氣去轉動一個風扇

An afterburner is extra fire in the jet stream.

An afterburner is extra fire in the jet streamafterburner 說到底就是噴流裡多加的一把火