truss span

例句：

1. 1.The bridge is designed to accommodate the trusses spanning across the river.
   这座桥的设计是为了容纳跨越河流的桁架。
2. 2.The engineer calculated the trusses span for the new building.
   工程师计算了新建筑的桁架跨度。
3. 3.The trusses spanning the roof of the building are made of steel.
   横跨建筑物屋顶的桁架是由钢制成的。