horizontal member

例句：

1. 1. The horizontal member is crucialfor the stability of the bridge.
   水平构件对于桥梁的稳定性至关重要。
2. 2. The engineer designed thehorizontal member to resist the weight of thebuilding.
   工程师设计了水平构件来抵抗建筑物的重量。
3. 3. The horizontal member was installed inthe middle of the floor, providing supportfor the ceiling.
   水平构件安装在地板中间，为天花板提供支撑。