section of groove

例句：

1. 1. The car's engine is located in the rear section of the vehicle.
   汽车的引擎位于车辆后部。
2. 2.The engineer measured the section of the tunnel to ensure it was safe for pedestrians.
   工程师测量了隧道的一段，以确保行人安全。
3. 3. The team worked diligently to excavate a section of the riverbed for construction purposes.
   团队努力工作，为建设目的挖掘河床的一部分。