lower sidewall

例句：

1. 1. The car's lower sidewall is damaged in the accident.
   这辆车的下侧壁在事故中受损。
2. 2.The engineer inspected the lower sidewall of the bridge for cracks.
   工程师检查了桥梁下侧壁是否有裂缝。
3. 3.The new design features a lower sidewall that provides better support for the passengers.
   新设计的特点是下侧壁，为乘客提供了更好的支撑。