n.（汽油引擎的）发火装置,着火，燃烧,点火，点燃
He trotted to the truck and switched on the ignition. Nothing happened.
他匆匆走向卡车并转动点火开关，结果没有任何反应。
The device automatically disconnects the ignition when the engine is switched off.
当引擎关掉时，这个装置会自动切断点火开关。
The ignition of methane gas killed eight men.
甲烷起火，致使8人丧生。