compound truss

例句：

1. 1. The engineer designed a compound truss to support the roof.
   工程师设计了一个复合桁架来支撑屋顶。
2. 2.In construction, compound trusses are used to provide structural integrity.
   在建筑中，复合桁架用于提供结构完整性。
3. 3. The safety of the structure was ensured by using a compound truss system.
   通过使用复合桁架系统，确保了结构的安全可靠。