trapezoidal roof truss

例句：

1. 1.The engineer designed a trapezoidal roof truss for the new building.
   工程师为新建筑设计了一个截角屋顶桁架。
2. 2.The structure is made of steel, which makes it durable and strong.
   这种结构由钢制成，这使得它耐用且坚固。
3. 3.The trapezoidal roof truss provides excellent ventilation and insulation.
   截角屋顶桁架提供了极好的通风和绝热性能。