chord member of truss

例句：

1. 1. The bridge is supported by several wooden trusses.
   这座桥由几根木桁支撑。
2. 2. The engineer designed the trusses to distribute the load evenly.
   工程师设计了桁来均匀分布负载。
3. 3. The construction of the truss was completed ahead of schedule.
   桁的建造提前完成。