ignitor drop

例句：

1. 1. The ignitor in the furnace is causing a drop in temperature.
   炉子里的点火器正在导致温度下降。
2. 2. The ignitor was dropped from the ceiling, and it landed on the floor.
   点火器从天花板上掉了下来，落在了地板上。
3. 3. The ignitor had to be replaced after the drop.
   在滴落之后，必须更换点火器。