英语释义
1. a part that fits into the cylinder head of an internal combustion engine and carries two electrodes separated by an air gap across which the current from the ignition system discharges to form the spark for combustion
2. one that initiates or gives impetus to an undertaking
3. a part of an engine that produces a spark that makes the fuel burn
4. a device used in an engine to produce a spark that ignites a fuel mixture