rear cross beam

例句：

1. 1. The rear cross beam is crucialfor the stability of the vehicle.
   后部交叉梁对于车辆的稳定性至关重要。
2. 2. The rearcross beam was damaged during the accident.
   事故中后部交叉梁受损。
3. 3. The engineercarefully checked the rear cross beam before startingthe engine.
   工程师在启动发动机前仔细检查了后部交叉梁。