engine oil pan

例句：

1. 1. The mechanics had to replace the engine oil pan after the accident.
   事故发生后，机械师不得不更换发动机油底壳。
2. 2. The old car's engine oil pan was leaking, and it needed to be repaired immediately.
   这辆旧车发动机油底壳漏油了，需要立即修理。
3. 3. After the inspection, the technician found that the engine oil pan was damaged and needed to be replaced.
   检查后，技术人员发现发动机油底壳损坏了，需要更换。