oil filler hole

例句：

1. 1. The engine needs to be cleaned out regularly to prevent oil from leaking into the filler hole.
   发动机需要定期清理，以防止机油泄漏到填充孔。
2. 2. The mechanic replaced the oil filter and cleaned out the oil filler hole.
   机械师更换了油过滤器并清理了油填充孔。
3. 3. The car's engine was making a loud noise, so the mechanic checked the oil filler hole and found a small piece of metal in it.
   汽车的引擎发出很大的声音，所以机械师检查了油填充孔，发现里面有一小片金属。