complex truss

例句：

1. 1.The engineer designed a complex truss to support the building's weight.
   工程师设计了一个复杂的桁架来支撑建筑物的重量。
2. 2.The construction of the bridge involved the use of complex truss structures.
   建造这座桥涉及到使用复杂的桁架结构。
3. 3.The design of the truss is crucial for the stability of the structure.
   桁架的设计对结构的稳定性至关重要。