spark plug porcelain insulator

例句：

1. 1.The spark plug is the part that connects the engine to the fuel system.
   火花塞是连接发动机和燃油系统的部分。
2. 2.The porcelain insulator isused to protect the electrical components from overheating.
   瓷绝缘体用于保护电气组件免受过热。
3. 3. The insulator iscrucial for maintaining the integrity of the electricalcircuit.
   绝缘体对于保持电路完整性至关重要。